Pay attention; be watchful.

synonyms: keep one's eyes peeled, keep one's eyes skinned.

Roget 459: be careful etc. adj.; reck^†; take care etc. (be cautious) 864; pay attention to etc. 457; take care of; look to, look after, see to, see after; keep an eye on, keep a sharp eye on; chaperon, matronize^†, play gooseberry; keep watch, keep watch and ward; mount guard, set watch, watch; keep in sight, keep in view; mind, mind one's business.    look sharp, look about one; look with one's own eyes; keep a good lookout, keep a sharp lookout; have all one's wits about one, have all one's eyes about one; watch for etc. (expect) 507; keep one's eyes open, have the eyes open, sleep with one's eye open.    ... show more