n.; pl. Diaries [ L. diarium, fr. dies day. See Deity. ] A register of daily events or transactions; a daily record; a journal; a blank book dated for the record of daily memoranda; as, a diary of the weather; a physician's diary. [ 1913 Webster ]
a. lasting for one day; as, a diary fever. [ Obs. ] “Diary ague.” Bacon. [ 1913 Webster ]