/nuyt"lee/ , adj.
1. coming or occurring each night: his nightly walk to the newsstand.
2. coming, occurring, appearing, or active at night: nightly revels.
3. of, pertaining to, or characteristic of night: the nightly gloom before a storm.
adv.
4. on every night: performances given nightly.
5. at or by night: an animal that is seen nightly.
[ bef. 900; ME; OE nihtlic. See NIGHT, -LY ]