lunchlunch /lʌntʃ/ noun [countableC]1a meal eaten in the middle of the dayfacilities for conferences and private business lunches (=when business people go to lunch to discuss things or entertain customers)
He has working lunches (=when you discuss business and eat) with his team to develop their approach.
It is important that the office is manned during thelunch hour (=the time when people eat lunch).
2there’s no such thing as a free lunch informal used to say that something may seem free, but that you have to pay for it in the end 3three-martini lunch informal a lunch that is supposed to be a working lunch, but where people enjoy themselves too much to do any work