coming or occurring each night
: his nightly walk to the newsstand.
coming, occurring, appearing, or active at night
: nightly revels.
of, pertaining to, or characteristic of night
: the nightly gloom before a storm.
on every night
: performances given nightly.
at or by night
: an animal that is seen nightly.
Origin: before 900; Middle English; Old English nihtlīc.