watch out

watch + out

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watch out (third-person singular simple present watches out, present participle watching out, simple past and past participle watched out)

1. (idiomatic) To be aware or conscious; to look closely or carefully; to use caution. Often used in the imperative.

   Watch out for low doorways, so you don’t hit your head.

• to heed
• to mind
• to beware
• to get away

• careful
• caution

watch out!

1. Used to warn someone of an imminent danger.

• beware, look out

• outwatch