Entry 2 senses · 2 variants Webster, 1913 Midnight /mĭd'-nītˌ/ · Mid·night · IPA /[ˈmɪd̚ˌnɐɪt]/ n. a. 01 n. The middle of the night; twelve o'clock at night. 1. The middle of the night; twelve o'clock at night. “The iron tongue of midnight hath told twelve.” — Shak. 02 a. Being in, or characteristic of, the middle of the night; as, midnight studies; midnight gloom. 1. Being in, or characteristic of, the middle of the night; as, midnight studies; midnight gloom.