watch out

Verb

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.
   • Being exiled from the Nexus was a huge shock, I still can't believe Tann did that. But at least Sloane's watching out for us and giving us whatever land we want. We hope to make a life out here and we've got our very own lakeside property with a view.2017, BioWare, Mass Effect: Andromeda (Science Fiction), Redwood City: Electronic Arts, →OCLC, PC, scene: Fresh start

   Synonyms:

   to beware, to get away, to heed, to mind

Interjection

1. Used to warn someone of an imminent danger.