Real Dictionary

stud
countable noun: A stud is an earring consisting of a small shape attached to a bar which goes through a hole in your ear.
countable noun: Studs are small pieces of metal which are attached to a surface for decoration.

stud in American English 1
any of a series of small knobs or rounded nailheads used to ornament a surface, as of leather
adjective: ornamented with rivets, nailheads, or other buttonlike, usually metallic objects
noun: a boss, knob, nailhead, or other protuberance projecting from a surface or part, esp. as an ornament
transitive verb: to set with or as if with studs, bosses, or the like

stud in American English 2
a number of horses, or sometimes other animals, esp. as kept for breeding
of or having to do with a stud
noun: a studhorse or stallion

stud in British English 1
noun: a large-headed nail or other projection protruding from a surface, usually as decoration
verb: to provide, ornament, or make with studs

stud in British English 2
noun: a group of pedigree animals, esp horses, kept for breeding purposes

stud in Mechanical Engineering
noun: A stud is a bolt without a flat top part, that is threaded at both ends but not in the center.

stud. in American English
abbreviation: student