keep (one's) eye(s) out (for something or someone)

keep (one's) eye(s) out (for something or someone)

To remain vigilant or carefully watchful (for something or someone). They should be arriving any minute, so keep your eyes out. Keep your eye out for a gift we could give your mother. Tell the team to keep their eyes out for the health inspector. I heard he'll be doing a surprise inspection soon.
See also: keep, out, something
Farlex Dictionary of Idioms.

keep one's eye(s) out

(for someone or something) Go to keep an eye out (for someone or something).
See also: eye, keep, out
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • keep eye out
  • keep (one's) eye out for (someone or something)
  • keep an eye out for
  • keep an eye out for (someone or something)
  • keep (one's) eye(s) open (for someone or something)
  • keep eyes
  • keep eyes open
  • keep one's eyes open
  • keep eyes peeled
  • keep (one's) eye(s) peeled (for something or someone)