a. | 1. | Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; - with of before the thing to be regulated or guarded; |
Adj. | 1. | watchful - 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" |
2. | watchful - experiencing or accompanied by sleeplessness; "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare |