clay /kleɪ/noun 9verb 2forms 3phrases 3 noun9 •earth made of very tiny bits that takes any shape while wet, and from which pots are made •An earth material with ductile qualities. •A tennis court surface made of crushed stone, brick, shale, or other unbound mineral aggregate.The French Open is played on clay. •(informal) A clay pigeon.We went shooting clays at the weekend. •The material of the human body.From clay we are made. •A clay pipe for smoking tobacco. •(Internet, humorous) Land or territory of a country or other political region, especially when subject to territorial claims.Vilnius is rightful Polish clay. •A particle less than 3.9 microns in diameter, following the Wentworth scale. •A moth (Mythimna ferrago). verb2 •To add clay to, to spread clay onto. •To purify using clay.The Portuguese had mastered the technique of claying sugar, and other European nations tried to learn the secrets from them. — 1985 formsclayed · claying · clays Phrases with clay clay upTo add clay to (something). feet of clayIn someone apparently strong and without failings, a hidden weakness which could lead to downfall. potter's clayThe clay used by a potter.