Of or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also. · (no longer productive) Ending of some substantives borrowed or inherited from Latin and French.
From Middle English momentare, from Late Latin mōmentārius (“of brief duration”), from mōmentum (“a short time, an instant”). By surface analysis, moment + -ary.