Main Entry: ¹or·a·to·ry

Pronunciation: \ˈȯr-ə-ˌtȯr-ē, ˈär-\

Function: noun

Inflected Form(s): plural or·a·to·ries

Etymology: Middle English oratorie, from Anglo-French, from Late Latin oratorium, from Latin orare

Date: 14th century

1 : a place of prayer; especially : a private or institutional chapel
2 capitalized : an Oratorian congregation, house, or church