an external or internal rib, or rim, for strength, as the flange of an iron beam; or for a guide, as the flange of a car wheel (see car wheel.); or for attachment to another object, as the flange on the end of a pipe, steam cylinder, etc.-a plate or ring to form a rim at the end of a pipe when fastened to the pipe.-to make a flange on; to furnish with a flange.-to be bent into a flange.