Trap (?), v. t. [imp. & p. p.Trapped (?); p. pr. & vb. n.Trapping.] [Akin to OE. trappe trappings, and perhaps from an Old French word of the same origin as E. drab a kind of cloth.] To dress with ornaments; to adorn; — said especially of horses.
Steeds... that trapped were in steel all glittering. Chaucer.
To deck his hearse, and trap his tomb-black steed. Spenser.
There she found her palfrey trapped
In purple blazoned with armorial gold. Tennyson.