To catch is to come up with or take possession of something departing, fugitive, or illusive. We catch a runaway horse, a flying ball, a mouse in a tr more..To catch is to come up with or take possession of something departing, fugitive, or illusive. We catch a runaway horse, a flying ball, a mouse in a trap. We clutch with a swift, tenacious movement of the fingers; we grasp with a firm but moderate closure of the whole hand; we grip or gripe with the strongest muscular closure of the whole hand possible to exert. We clasp in the arms. We snatch with a quick, sudden, and usually a surprising motion. In the figurative sense, catch is used of any act that brings a person or thing into our power or possession; as, to catch a criminal in the act; to catch an idea, in the sense of apprehend or comprehend. Compare ARREST.(verb)