बत्ती (battii)

noun Primarily means a light or lamp (electric or flame-based), and by extension a traffic signal; also colloquially used for a vehicle's headlight/indicator and in a few common idiomatic phrases.
Sense 1 : electric light / lamp
noun, feminine
Synonyms: रोशनी (roshnii), लाइट (laait, colloquial)
Frequency: high
Cultural Note: In everyday Delhi households you will hear बत्ती बंद करो (battii band karo, 'turn off the light') far more than any fancier phrase -- it is the default word parents use when leaving a room, right alongside पंखा बंद करो (pankhaa band karo, 'turn off the fan').
Common Mistakes: 1) Learners often reach for रोशनी (roshnii) when they mean the physical fixture or bulb; बत्ती (battii) is the more natural word for the object itself, as in बत्ती जलाओ (battii jalaao, 'turn on the light'), while रोशनी (roshnii) suits the glow or illumination it produces.
Sample Sentences:
बत्ती बंद करो, सोने का वक्त हो गया है। Turn off the light, it's time to sleep.
(battii band karo, sone kaa vakt ho gayaa hai।)
Register: Casual -- Mood: Imperative -- Voice: Active
कमरे की बत्ती जल रही है। The room's light is on.
(kamre kii battii jal rahii hai।)
Register: Casual -- Mood: Indicative -- Aspect: Continuous -- Tense: Present -- Voice: Active
रात को बरामदे की बत्ती जलती रहती है। The veranda light stays on at night.
(raat ko baraamde kii battii jaltii rahtii hai।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
बत्ती चली गई, अब क्या करेंगे? The power's gone, what will we do now?
(battii chalii gaii, ab kyaa karenge?)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
अगर बत्ती जल रही होती तो कमरा इतना अंधेरा नहीं होता। If the light had been on, the room wouldn't have been this dark.
(agar battii jal rahii hotii to kamraa itnaa andheraa nahiin hotaa।)
Register: Neutral -- Mood: Counterfactual -- Aspect: Continuous -- Voice: Active
क्या तुम बत्ती जला सकते हो? यहाँ कुछ दिख नहीं रहा। Can you turn on the light? I can't see anything here.
(kyaa tum battii jalaa sakte ho? yahaan kuchh dikh nahiin rahaa।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
बाहर निकलते वक्त सारी बत्तियाँ बंद कर देना। Turn off all the lights when you leave.
(baahar nikalte vakt saarii battiyaan band kar denaa।)
Register: Casual -- Mood: Imperative -- Voice: Active
बिजली विभाग को चाहिए कि सड़क की बत्तियाँ जल्दी ठीक की जाएँ। The electricity department should get the street lights fixed soon.
(bijlii vibhaag ko chaahie ki sadak kii battiyaan jaldii thiik kii jaaen।)
Register: Formal -- Mood: Subjunctive -- Voice: Passive
पिछली सर्दियों में हमारे घर की बत्तियाँ बदली गई थीं। The lights in our house were replaced last winter.
(pichhlii sardiyon men hamaare ghar kii battiyaan badlii gaii thiin।)
Register: Neutral -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Passive
पंखा बंद करो और बत्ती भी बंद करो, बिजली का बिल बहुत आ रहा है। Turn off the fan and turn off the light too, the electricity bill is coming very high.
(pankhaa band karo aur battii bhii band karo, bijlii kaa bil bahut aa rahaa hai।)
Register: Casual -- Mood: Imperative -- Voice: Active
आँगन में लगी बत्ती की रोशनी में बच्चे खेल रहे थे। The children were playing in the light of the lamp fixed in the courtyard.
(aangan men lagii battii kii roshnii men bachche khel rahe the।)
Register: Literary -- Mood: Indicative -- Aspect: Continuous -- Tense: Past -- Voice: Active
Sense 2 : traffic signal
noun, feminine
Synonyms: सिग्नल (signal), ट्रैफ़िक लाइट (traifik laait)
Frequency: high
Cultural Note: In everyday driving talk across NCR, people say लाल बत्ती (laal battii, 'red light') and बत्ती पर रुकना (battii par ruknaa, 'to stop at the signal') constantly -- सिग्नल (signal) is understood but बत्ती (battii) is what actually comes out of a local's mouth.
Sample Sentences:
आगे बत्ती लाल है, गाड़ी धीरे करो। The light ahead is red, slow the car down.
(aage battii laal hai, gaadii dhiire karo।)
Register: Casual -- Mood: Imperative -- Tense: Present -- Voice: Active
हमें बत्ती पर पाँच मिनट रुकना पड़ा। We had to stop at the signal for five minutes.
(hamen battii par paanch minat ruknaa padaa।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
वह हमेशा लाल बत्ती तोड़ता है। He always jumps the red light.
(vah hameshaa laal battii todtaa hai।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
बत्ती हरी हो गई है, चलो अब। The light has turned green, let's go now.
(battii harii ho gaii hai, chalo ab।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Present -- Voice: Active
अगर वह बत्ती पर रुकता, तो एक्सिडेंट नहीं होता। If he had stopped at the light, the accident wouldn't have happened.
(agar vah battii par ruktaa, to eksident nahiin hotaa।)
Register: Neutral -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
इस चौराहे पर बत्ती कब से खराब पड़ी है? Since when has the traffic light at this intersection been broken?
(is chauraahe par battii kab se kharaab padii hai?)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Present -- Voice: Active
पुलिस वाला बत्ती तोड़ने वालों का चालान काट रहा था। The policeman was issuing fines to those jumping the red light.
(pulis vaalaa battii todne vaalon kaa chaalaan kaat rahaa thaa।)
Register: Casual -- Mood: Indicative -- Aspect: Continuous -- Tense: Past -- Voice: Active
कृपया बत्ती पर रुकें और सिग्नल का पालन करें। Please stop at the traffic light and follow the signal.
(kripyaa battii par ruken aur signal kaa paalan karen।)
Register: Formal -- Mood: Imperative -- Voice: Active
जब बत्ती पीली हो जाए, तो रुकने की तैयारी करो। When the light turns yellow, get ready to stop.
(jab battii piilii ho jaae, to rukne kii taiyaarii karo।)
Register: Neutral -- Mood: Subjunctive -- Voice: Active
इस शहर में आधी बत्तियाँ काम ही नहीं करतीं। Half the traffic lights in this city don't even work.
(is shahar men aadhii battiyaan kaam hii nahiin kartiin।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
बत्ती पर गाड़ी रोकी जाती है ताकि हादसे न हों। Vehicles are stopped at the signal so that accidents don't happen.
(battii par gaadii rokii jaatii hai taaki haadse n hon।)
Register: Formal -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Passive
Sense 3 : wick (of an oil lamp)
noun, feminine
Synonyms: दीपक की बत्ती (diipak kii battii)
Frequency: medium
Cultural Note: This is the older, more literal sense -- the cotton wick of a दीया (diiyaa, 'oil lamp') that you light during पूजा (poojaa, 'worship') or Diwali; the modern 'electric light' sense grew out of this original meaning.
Sample Sentences:
दीये में बत्ती डालो। Put a wick in the oil lamp.
(diiye men battii daalo।)
Register: Casual -- Mood: Imperative -- Voice: Active
दादी हर शाम दीये में नई बत्ती डालती हैं। Grandmother puts a new wick in the oil lamp every evening.
(daadii har shaam diiye men naii battii daaltii hain।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
पूजा के लिए बत्ती और तेल तैयार कर लो। Get the wick and oil ready for the worship.
(poojaa ke lie battii aur tel taiyaar kar lo।)
Register: Devotional -- Mood: Imperative -- Voice: Active
बत्ती जल रही थी और कमरा हल्की रोशनी से भर गया था। The wick was burning and the room had filled with a soft glow.
(battii jal rahii thii aur kamraa halkii roshnii se bhar gayaa thaa।)
Register: Literary -- Mood: Indicative -- Aspect: Continuous -- Tense: Past -- Voice: Active
दिवाली पर हम मिट्टी के दीयों में रुई की बत्ती बनाते हैं। On Diwali we make cotton wicks for the clay lamps.
(divaalii par ham mittii ke diiyon men ruii kii battii banaate hain।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
अगर बत्ती गीली हो जाती तो दीया नहीं जलता। If the wick had gotten wet, the lamp would not have lit.
(agar battii giilii ho jaatii to diiyaa nahiin jaltaa।)
Register: Neutral -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
पुजारी ने बत्ती को घी में डुबोकर दीये में रखा। The priest dipped the wick in ghee and placed it in the lamp.
(pujaarii ne battii ko ghii men dubokar diiye men rakhaa।)
Register: Devotional -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
बत्ती इतनी छोटी हो गई थी कि जल्दी बुझ गई। The wick had become so small that it went out quickly.
(battii itnii chhotii ho gaii thii ki jaldii bujh gaii।)
Register: Neutral -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
मंदिर में सैकड़ों बत्तियाँ एक साथ जलाई जाती हैं। Hundreds of wicks are lit together in the temple.
(mandir men saikdon battiyaan ek saath jalaaii jaatii hain।)
Register: Devotional -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Passive
Sense 4 : idiom: to scold/reprimand someone
noun, feminine Occurs almost exclusively inside the compound idiom बत्ती लगाना (battii lagaanaa, 'to scold/tell off') or बत्ती दिखाना (battii dikhaanaa) in some regional colloquial use; not used as a standalone noun with this meaning.
Synonyms: डाँट लगाना (daant lagaanaa)
Frequency: low
Cultural Note: You will hear this in informal, joking contexts -- something like उसकी अच्छी बत्ती लगी (uskii achchhii battii lagii, 'he got a real telling-off') -- it has a light, almost mocking flavor rather than being harsh or formal.
Common Mistakes: 1) This sense only exists locked inside the fixed idiom बत्ती लगाना (battii lagaanaa) -- learners should not expect बत्ती (battii) alone to carry this meaning outside that phrase.
Sample Sentences:
बॉस ने उसकी अच्छी बत्ती लगा दी। The boss gave him a real telling-off.
(bos ne uskii achchhii battii lagaa dii।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
अगर तू फिर लेट आया तो पापा तेरी बत्ती लगा देंगे। If you're late again, dad will give you a proper scolding.
(agar too phir let aayaa to paapaa terii battii lagaa denge।)
Register: Casual -- Mood: Indicative -- Tense: Future -- Voice: Active
मास्टर जी हर हफ्ते किसी न किसी की बत्ती लगाते हैं। The teacher gives someone a telling-off every single week.
(maastar jii har haphte kisii n kisii kii battii lagaate hain।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
मैनेजर उसकी बत्ती लगा रहा था जब मैं वहाँ पहुँचा। The manager was giving him a scolding when I got there.
(mainejar uskii battii lagaa rahaa thaa jab main vahaan pahunchaa।)
Register: Casual -- Mood: Indicative -- Aspect: Continuous -- Tense: Past -- Voice: Active
उसकी अच्छी बत्ती लगी, तभी तो चुपचाप बैठा है। He got a real telling-off, that's why he's sitting so quietly.
(uskii achchhii battii lagii, tabhii to chupchaap baithaa hai।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
जरा उसकी बत्ती तो लगा दे, बहुत बदतमीज़ी कर रहा है। Go give him a good scolding, he's being really rude.
(jaraa uskii battii to lagaa de, bahut badatmiizii kar rahaa hai।)
Register: Casual -- Mood: Imperative -- Voice: Active
अगर सच पता चल जाए तो घर वाले उसकी बत्ती लगा दें। If the truth comes out, the family might just give him a proper telling-off.
(agar sach pataa chal jaae to ghar vaale uskii battii lagaa den।)
Register: Casual -- Mood: Subjunctive -- Voice: Active
अगर वो झूठ पकड़ा जाता, तो उसकी ज़रूर बत्ती लगती। If his lie had been caught, he would definitely have gotten a scolding.
(agar vo jhooth pakdaa jaataa, to uskii zaroor battii lagtii।)
Register: Casual -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
इतनी ज़ोर से बत्ती लगाई गई कि पूरा दफ्तर सुन रहा था। He was scolded so loudly that the whole office could hear it.
(itnii zor se battii lagaaii gaii ki pooraa daphtar sun rahaa thaa।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Passive
Morphology
Noun
(sg.f.direct): बत्ती (battii)
(sg.f.oblique): बत्ती (battii)
(pl.f.direct): बत्तियाँ (battiyaan)
(pl.f.oblique): बत्तियों (battiyon)