Entry 2 senses · 2 variants Webster, 1913 Moonlight /(mo͞on"līt`)/ · Moon·light · IPA /ˈmunˌlaɪt/ n. v. i. 01 n. The light of the moon. 1. The light of the moon. 02 v. i. To work at a second job in addition to one's main occupation; -- often done at night, hence the word. 1. To work at a second job in addition to one's main occupation; -- often done at night, hence the word.