to change from a fluid into a thickened mass; curdle; congeal

Let the pudding stand two hours until it coagulates.

Biology . (of blood) to form a clot.

Physical Chemistry . (of colloidal particles) to flocculate or cause to flocculate by adding an electrolyte to an electrostatic colloid.

Obsolete . coagulated.

verb

dilute , dissolve , melt , open , thin , unclot

verb

clabber , coalesce , compact , concentrate , concrete , condense , congeal , consolidate , curdle , dry , gel , gelate , gelatinize , glop up , harden , inspissate , jell , jellify , jelly , lopper , set , solidify , thicken , clot , clod , cotter , curd