noun Painful involuntary contraction of a muscle or muscles, typically caused by fatigue or strain. (he suffered severe cramps in his foot) A tool, typically shaped like a capital G, for clamping two objects together for gluing or other work.
verb Restrict or inhibit the development of. (tighter rules will cramp economic growth) Fasten with a cramp or cramps. (cramp the gates to the posts) Suffer from sudden and painful contractions of a muscle or muscles.