Diary \Di"a*ry\ (d[imac]"[.a]*r[y^]), 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]