1. [syn: vigilantly, watchfully]
The Collaborative International Dictionary of English v.0.48:
Watchful \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."
'Twixt prayer and watchful love his heart dividing.
Syn: Vigilant; attentive; cautious; observant; circumspect;
[1913 Webster] -- Watch"ful*ly, adv. --
WordNet (r) 3.0 (2006):
adv 1: in a watchful manner [syn: vigilantly, watchfully]