[syn: argus-eyed, open-eyed, vigilant, wakeful]
The Collaborative International Dictionary of English v.0.48:
Argus-eyed \Ar"gus-eyed\, a.
Extremely observant; watchful; sharp-sighted.
[1913 Webster]
WordNet (r) 3.0 (2006):
argus-eyed
adj 1: having very keen vision; "quick-sighted as a cat" [syn:
argus-eyed, hawk-eyed, keen-sighted, lynx-eyed,
quick-sighted, sharp-eyed, sharp-sighted]
2: 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, open-eyed, vigilant, wakeful]