Definition of orison in English:

orison

Pronunciation /ˈôrəsən/ /ˈɔrəsən/ /ˈôrəzən/ /ˈɔrəzən/

noun

archaic
  • A prayer.

    ‘The orisons of fury will be sung… with a new found desperation Zaile sprinted into the dark.’
    • ‘For in his morning orisons he loves the sun and the sun loves him.’
    • ‘Among these elements were the language of sacrifice, the vesture of Aaronic priests, clouds of incense rising like orisons to the throne, and the prayer of worship chanted by priests and people alike.’
    • ‘Nymph, in thy orisons be all my sins remember'd.’
    entreaty, plea, appeal, petition, solicitation, exhortation, urge, prayer, invocation, suit, request, application

Origin

Middle English from Old French oreison, from Latin oratio(n-) ‘speech’ (see oration).