look out

Idioms & Phrases

look out

Also, watch out. Be careful, be watchful, as in Look out that you don't slip and fall on the ice, or Watch out! There's a car coming. [c. 1600] Also see look out for.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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