Definition of observant
(Entry 1 of 2)
1a
: paying strict attention : watchful
an observant spectator
b
: keen, perceptive
observant of the mistakes of others Good reporters are keenly observant of everything around them.
observant
nounDefinition of observant (Entry 2 of 2)
obsolete
: an assiduous or obsequious servant or attendant
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Merriam-Webster unabridged
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Time Traveler for observant
The first known use of observant was in 1599
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