1590s, "on horseback," past-participle adjective from mount (v.). From 1690s as "set up for display."
"to make a promenade; walk about for amusement, display, or exercise," 1580s, from promenade (n.). Related: Promenaded; promenading.
early 14c., "action of displaying," from Old French exhibicion, exibicion "show, exhibition, display," from Late Latin exhibitionem (nominative exhibitio), noun of action from past-participle stem of Latin exhibere "to show, display, present," literally "hold out, hold forth," from ex "out" (see ex-) + habere "to hold" (from PIE root *ghabh- "to give or receive"). Also from early 15c. as "sustenance, food, source of support." Meaning "that which is exhibited" is from 1786.