-o*ry (?). [L. -orius: cf. F. -oire.]
An adjective suffix meaning of or pertaining to, serving for; as in auditory, pertaining to or serving for hearing; prohibitory, amendatory, etc.
2. [L. -orium: cf. F. -oire.]
A noun suffix denoting that which pertains to, or serves for; as in ambulatory, that which serves for walking; consistory, factory, etc.
© Webster 1913.