O·pen-eyed a. With eyes widely open; alert to possible danger; watchful; vigilant.
Syn: -- argus-eyed, hawk-eyed, unsleeping, vigilant, wary, watchful.
adj : carefully observant or attentive; on the lookout for
possible danger; "a policy of open-eyed awareness";
"the vigilant eye of the town watch"; "there was a
watchful dignity in the room"; "a watchful parent with
a toddler in tow" [syn: argus-eyed, vigilant, wakeful,