1. (adj)alert, watchful engaged in or accustomed to closeobservation "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
2. (adj)insomniac, sleepless, watchful experiencing or accompanied by sleeplessness "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare
Definition of 'watchful'
