Watchful definition

wŏchfəl
(archaic) Wakeful; unsleeping.
adjective
4
1
Closely observant or alert; vigilant.

Kept a watchful eye on the clock.

adjective
3
3
Watching closely; vigilant; alert.
adjective
2
2
adjective
0
0
(archaic) Not sleeping; awake.
adjective
3
4
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Characterized by vigilance.
adjective
1
2