rim·mer I. \ˈrimə(r)\noun (-s) Etymology:rim (II) + -er : one that rims: as a.: an implement for cutting, trimming, or ornamenting the rim of something b.: a worker who forms edge wires that are used as top frames of bedspring assemblies or one who attaches rims to the top coils of bedsprings II. noun (-s) Etymology:rim (V) + -er : reamer