1.
[syn: argus-eyed, open-eyed, vigilant, wakeful]
The Collaborative International Dictionary of English v.0.48:
Vigilant \Vig"i*lant\, a. [L. vigilans, -antis, p. pr. of
vigilare to watch, fr. vigil awake: cf. F. vigilant. See
Vigil.]
Attentive to discover and avoid danger, or to provide for
safety; wakeful; watchful; circumspect; wary. "Be sober, be
vigilant." --1 Pet. v. 8.
[1913 Webster]
Sirs, take your places, and be vigilant. --Shak.
[1913 Webster]
WordNet (r) 3.0 (2006):
vigilant
adj 1: 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]