• (p.a.) Accoutered with defensive armor; -- said of a horse. • (p.a.) Wearing rich caparisons.
Bard'ed p. adjective [ See Bard horse armor.] 1. Accoutered with defensive armor; -- said of a horse. 2. (Her.) Wearing rich caparisons. « Fifteen hundred men . . . barded and richly trapped. Stow. » 
In heraldry, barded means having horse-trappings.