| Wakeful (a.) Not sleeping; indisposed to sleep; watchful; vigilant. Thesaurus Entries 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 |