ˈȯrəsən, ˈär-, -rəzən noun
( -s )
Etymology: Middle English, from Old French, from Late Latin oration-, oratio, from Latin, speech, oration — more at oration
1. : prayer
nymph, in thy orisons be all my sins remembered — Shakespeare
2. : mystical contemplation
the steps of the ladder … in the art of contemplation are called, in technical terms, the degrees of orison — Evelyn Underhill