(a) To provide (a horse) with ceremonial or military trappings; also fig. of a bull [quot. a1420]; ppl. trapped, caparisoned; armor-clad; wel trapped; (b) to dress (sb.) elaborately; also, ?equip (sb.) with an elaborately armored horse; (c) fig. to load (sb., a tongue with something evil); (d) trapped of him-self, of the Trojan horse: ?provided with trappings of the same material as itself; ?furnished with a trap door [= trappen v.(1)].