noun one who girds; a satirist.
2. girder ·noun one who, or that which, girds.
3. girder ·noun a main beam; a stright, horizontal beam to span an opening or carry weight, such as ends of floor beams, ·etc.; hence, a framed or built-up member discharging the same office, technically called a compound girder. ·see illusts. of frame, and doubleframed floor, under double.