<p><strong>Noun</strong></p><ul><li>A piece of metal stamped and issued by the authority of a government for use as money.</li><li>A number of such pieces.</li><li>Informal: Money; cash.</li><li>Architecture: Quoin.</li><li>Archaic: A corner cupboard of the 18th century.</li></ul><p><strong>Adjective</strong></p><ul><li>Operated by, or containing machines operated by, inserting a coin or coins into a slot: A coin laundry.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object)<ul><li>To make (coinage) by stamping metal.</li><li>To convert (metal) into coinage.</li><li>To make; invent; fabricate: To coin an expression.</li><li>Metalworking: To shape the surface of (metal) by squeezing between two dies.</li></ul></li><li>(used without object)<ul><li>British Informal: To counterfeit, especially to make counterfeit money.</li></ul></li></ul>