Definition of flange

• n. - 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.
• n. - A plate or ring to form a rim at the end of a pipe when fastened to the pipe.
• v. t. - To make a flange on; to furnish with a flange.
• v. i. - To be bent into a flange.