nightly

Short definition from Wiktionary

Adjective

1. 1
   Happening or appearing in the night; night-time; nocturnal.
2. 2
   Performing, occurring, or taking place every night.
3. 3
   Used in the night.

Adverb

1. 1
   Every night.

Noun

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