passe·ment I. \ˈpasmənt\noun alsopas·sa·ment\-səm-\ (-s) Etymology: Middle French passement, from passer to pass + -ment : an ornamental braid or decorative trimming resembling lace and made of gold, silver, or silk threads II. \ˈpaˌsment\transitive verb (-ed/-ing/-s) : to trim or edge with passement