a book containing the Psalms, readings, prayers, etc. of the Divine Office
Origin of breviaryMedieval Latin breviarium ; from L, an abridgment ; from breviarius, abridged ; from brevis, brief
nounpl. bre·vi·ar·ies Ecclesiastical
A book containing the hymns, offices, and prayers for the canonical hours.
Origin of breviaryMiddle English breviarie, from Old French breviaire, from Medieval Latin breviarium, from Latin, summary, from brevis, short; see brief.
From Latin breviārium (“summary”) (compare abbreviation), ultimately from brevis (“short”).