Definition of lunch
(Entry 1 of 2)
1
: a usually light meal
especially
: one taken in the middle of the day
2
: the food prepared for a lunch
out to lunch
slang
: out of touch with reality
lunch
verb
lunched; lunching; lunches
Definition of lunch (Entry 2 of 2)
: to eat lunch
: to treat to lunch
Buying Guide
Our Reviews team has selected the best lunch boxes.
Test Your Vocabulary
Name That Color
-
- Name that color:

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share lunch
Time Traveler for lunch
The first known use of lunch was in 1800
See more words from the same year