Please turn the lights off.
Here, the word "off" is a/ an -

• Please turn the lights off. Here, the word "off" is a/ an - Adverb.
- 'off' এখানে adverb হিসেবে কাজ করছে,
- কারণ এটি verb 'turn' কে modify করে, indicating the action of turn the light off.

• Off (Adverb):
- English meaning: Used to say that something has been removed or has become separated.
- Bangla meaning: কোনো কিছু সরিয়ে ফেলা হয়েছে বা আলাদা হয়ে গেছে বোঝাতে ব্যবহৃত।

• Example sentence:
- The label must have fallen off.
- They told him to keep his shirt off during the match.

Source: Oxford Dictionary.