Watchful meaning

wŏchfəl
Wakeful; unsleeping.
adjective
2
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adjective
1
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Not sleeping; awake.
adjective
1
1
Closely observant or alert; vigilant.

Kept a watchful eye on the clock.

adjective
1
2
Watching closely; vigilant; alert.
adjective
0
1
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Characterized by vigilance.
adjective
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1