Definition of "nightly" in English

adjective

1. Happening or appearing in the night; night-time; nocturnal.

   • nightly dews

2. Performing, occurring, or taking place every night.

   • The dog demanded to go out for his nightly walk.

3. Used in the night.

adverb

1. Every night.

   • He checks his email nightly.

noun

1. (software) A build of a software program with the latest changes, released every night.