fully awake; with the eyes wide open.

alert, keen, or knowing

a wide-awake young woman.

Also called wide-awake hat. a soft, low-crowned felt hat.

the sooty tern.

adjective

active , alert , all ears , attentive , bright , bright-eyed and bushy-tailed , fast on the draw , heads up , intelligent , lively , on guard * , on one\'s toes , on one’s toes , on the ball , on the ball * , on the job , on the lookout , psyched up , quick , ready , sharp , spirited , vigilant , watchful , wide-eyed , wired * , awake , unsleeping , observant , open-eyed , wakeful , wary , aware , keen , on the qui vive