a roundish viscous lump formed by coagulation of liquid, e.g. creama coagulated mass produced by clotting of bloodBrit, informal a stupid person [Old English clott]
verb intransto become a clot; to form clots or cause (a liquid) to clotsaid of blood: to undergo a sequence of complex chemical and physical reactions that results in conversion into a coagulated mass verb transto cause (a liquid) to clot