-ory \-o*ry\suff. [L. -orius: cf. F. -oire.]
1. An adjective suffix meaning of or pertaining to, serving
for; as in auditory, pertaining to or serving for hearing;
prohibitory, amendatory, etc.
[1913 Webster]
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.
[1913 Webster] Oryal