n. & v.
n. 1 a piece of flat usu. round metal stamped and issued by authority as money. 2 (collect.) metal money.
v.tr. 1 make (coins) by stamping. 2 make (metal) into coins. 3 invent or devise (esp. a new word or phrase). coin-box 1 a telephone operated by inserting coins. 2 the receptacle for these. coin money make much money quickly. coin-op a launderette etc. with automatic machines operated by inserting coins. to coin a phrase iron. introducing a banal remark or cliché.
[ ME f. OF, = stamping-die, f. L cuneus wedge ]