01 n. A place of orisons, or prayer; especially, a chapel or small room set apart for private devotions.
pl.
Oratories ((#))
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1.
A place of orisons, or prayer; especially, a chapel or small room set apart for private devotions.“An oratory [temple] . . . in worship of Dian.” — Chaucer.“Do not omit thy prayers for want of a good oratory, or place to pray in.” — Jer. Taylor.
Phrases & compounds
Fathers of the Oratory —
a society of priests founded by St. Philip Neri, living in community, and not bound by a special vow. The members are called also oratorians.