1 lunch /ˈlʌntʃ/ noun
plural lunches
1 lunch
plural lunches
Learner's definition of LUNCH
: a light meal eaten in the middle of the day
◊ When people do lunch they have lunch together. This is an informal phrase that is often associated with people in business.

eat/have someone or something for lunch

US, informal or eat someone's or something's lunch
: to defeat someone or something very badly

lose your lunch

US slang
: to throw up : vomit

no free lunch

◊ The expression there is no free lunch or there is no such thing as a free lunch means that it is not possible to get something that is desired or valuable without having to pay for it in some way.

out to lunch

: not aware of what is really happening : too strange or confused to notice or understand what is really happening
2 lunch /ˈlʌntʃ/ verb
lunches; lunched; lunching
2 lunch
lunches; lunched; lunching
Learner's definition of LUNCH
[no object]
: to eat lunch

— luncher

noun, plural lunchers [count]