- 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
'Twixt prayer and watchful love his heart dividing. --Keble. [1913 Webster]
The Collaborative International Dictionary of English. 2000.