Watch·ful a. Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; -- with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits. “Many a watchful night.” --Shak. “Happy watchful shepherds.” --Milton.
'Twixt prayer and watchful love his heart dividing. --Keble.
Syn: -- Vigilant; attentive; cautious; observant; circumspect; wakeful; heedful.
-- Watch*ful*ly, adv. -- Watch*ful*ness, n.
adv : in a watchful manner [syn: vigilantly]