Di‐ur″nal (?), n. [Cf. F. diurnal a prayerbook. See Diurnal, a.] 1. A daybook; a journal. Tatler.
2. (R. C. Ch.) A small volume containing the daily service for the “little hours,” viz., prime, tierce, sext, nones, vespers, and compline.
3. (Zoöl.) A diurnal bird or insect.