-tory 1
a suffix occurring in loanwords from Latin, orig. adjectival derivatives of agent nouns ending in -tor ( predatory ); also forming adjectival derivatives directly from verbs ( obligatory; transitory ).
[ -torius, equiv. to -tor- -TOR + -ius adj. suffix ]
-tory 2
a suffix occurring in loanwords from Latin, usually derivatives from agent nouns ending in -tor or directly from verbs, denoting a place or object appropriate for the activity of the verb: dormitory; repository.
[ -torium, n. use of neut. of -torius -TORY 1 ]