Meaning of -ORY in English

-ORY

1.

suffix forming nouns denoting a place for a particular function (dormitory; refectory).

Derivatives:

-orial suffix forming adjectives.

Etymology: L -oria, -orium, sometimes via ONF and AF -orie, OF -oire 2.

suffix forming adjectives (and occasionally nouns) relating to or involving a verbal action (accessory; compulsory; directory).

Etymology: L -orius, sometimes via AF -ori(e), OF -oir(e)

Oxford English vocab.      Оксфордский английский словарь.