keep an eye out for

keep an eye out for (someone or something)

To remain vigilant or carefully watchful for something or someone. They should be arriving any minute, so keep an eye out for them. Keep an eye out for a gift we could give your mother. Keep an eye out for the health inspector. We heard he'll be doing a surprise inspection soon.
See also: eye, keep, out

keep an eye out for

Also, keep a sharp lookout for. Be watchful for something or someone, as in Keep an eye out for the potholes in the road, or They told him to keep a sharp lookout for the police. The first expression, sometimes amplified to keep a sharp eye out for, dates from the late 1800s, the variant from the mid-1700s. Also see have one's eye on, def. 1; keep a weather eye; keep one's eyes open; look out.
See also: eye, keep, out

keep an eye out (or open) for

look out for something with particular attention.
1996 Guardian Keep an eye open for kingklip, a delectable fish, and the superb local hake.
See also: eye, keep, out
References in periodicals archive ?
Allowed to roam the building alone, call on friends on different floors, ride the lifts and play in the gardens without an adult in tow - because all neighbours will keep an eye out for them - they quickly become self-sufficient.