coagulateto change from a liquid to a semi-solid or solid state; to clotWhen exposed to air, blood begins to coagulate and form a scab.NoteWhen exposed to air, blood begins to coagulate and form a scab.Elon.io is an online learning platformWe have an entire course teaching GRE Verbal — Essential Vocabulary grammar and vocabulary.Start learning GRE Verbal — Essential Vocabulary now