Wakeful

a.

1.

Not sleeping; indisposed to sleep; watchful; vigilant. Dissembling sleep, but wakeful with the fright. - Dryden.

Adj.	1.	wakeful - 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" Synonyms: open-eyed, vigilant, watchful, argus-eyed
	2.	wakeful - (of sleep) easily disturbed; "in a light doze"; "a light sleeper"; "a restless wakeful night" Synonyms: light

agile, alert, alive, attentive, awake, bright, insomniac, insomnious, keen, nimble, on the, on the alert, on the ball, on the job, prompt, qui vive, quick, ready, restless, sharp, sleepless, slumberless, smart, unblinking, unnodding, unsleeping, unwinking, wide-awake