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Synonyms

watch out

British  

verb

  1. (intr, adverb) to be careful or on one's guard

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a less common word for lookout

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
watch out Idioms  

  1. see look out; watch it.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The IRS is warning people to watch out for scams related to the One Big Beautiful Bill Act.

From MarketWatch • Apr. 9, 2026

Many fitness professionals advise people to watch out for unaccredited trainers who increase the current too quickly or make it too strong.

From The Wall Street Journal • Apr. 1, 2026

Whatever happens, it’s going to be big and something investors should watch out for.

From Barron's • Mar. 18, 2026

He says that men should watch out for lumps, pain, discomfort or nipple inversion.

From Los Angeles Times • Mar. 17, 2026

I wanted to watch out the window in case I wasn’t dreaming.

From "The Night Diary" by Veera Hiranandani

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.