资料来源 : pyDict

警醒的,警戒著的,警惕的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.

         Sirs, take your places, and be vigilant. --Shak.

资料来源 : WordNet®

vigilant
     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}, {open-eyed}, {wakeful},
            {watchful}]