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 breviārium from Latin summary from brevis short ; see brief .
From Latin breviārium (“summary”) (compare abbreviation), ultimately from brevis (“short”).