- nightly⇄adj. 1. done, happening, or appearing every night.
Ex. nightly attacks, nightly disorder.
2. done, happening, or appearing at night.
Ex. nightly dew, a nightly visitor.
3. of or belonging to night; characteristic of night.nightly⇄adv. 1. every night.
Ex. Performances are given nightly except on Sunday.
2. at night; by night.
Ex. Many animals come out only nightly.nightly⇄nightly, adjective, adverb.