Definition of nightly
(Entry 1 of 2)
1
: happening, done, or used by night or every night
2
: of or relating to the night or every night
nightly
adverbDefinition of nightly (Entry 2 of 2)
: every night
also
: at or by night
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Merriam-Webster unabridged
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Time Traveler for nightly
The first known use of nightly was before the 12th century
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