Stud1  —n. 1 large-headed projecting nail, boss, or knob, esp. For ornament. 2 double button, esp. For use with two buttonholes in a shirt-front. —v. (-dd-) 1 set with or as with studs. 2 (as studded adj.) (foll. By with) thickly set or strewn with. [old english]