ap·pose \aˈpōz\transitive verb (-ed/-ing/-s) Etymology: Middle French aposer, from Old French, from a- (from Latin ad-) + poser to put, place — more at pose 1.archaic: to place opposite or before : apply (one thing) to another < appose a seal to a document > 2.: to place in juxtaposition or proximity < chromosomes … with their transverse bands exactly apposed — Discovery >