Definition of lookout
(Entry 1 of 2)
look out
verblooked out; looking out; looks out
Definition of look out (Entry 2 of 2)
: to take care or concern oneself
—used with forlooking out for number one
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Slippery Words Quiz—Changing with the Times
- What is an earlier meaning of nice?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Anagram puzzles meet word search.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quizWords of Snow and Ice Quiz
A selection of words from the chillier parts of t...
Take the quizName That Thing
Test your visual vocabulary with our 10-question ...
Take the quizSCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share lookout
Time Traveler for lookout
The first known use of lookout was in 1662
See more words from the same year