NIGHTLY, adjective 1. Done by night; happening in the night, or appearing in the night; as nightly sports; nightly dews. 2. Done every night. The watch goes his nightly round. NIGHTLY, adverb 1. By night. Thee, Sion, and the flowery brooks beneath, nightly I visit. 2. Every night.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI