knightdom noun3 •The quality, or condition of a knight; knighthood •The sphere or world of knights; knights collectivelyThe dregs of knightdom and various men-at-arms shared the tables and benches in noisome sleep. — 2012 •The domain of a knightOnly a few years before his birth on May 18, 1824, in the baronial castle, the tiny but largely autonomous knightdom had been annexed by Bavaria during the Napoleonic wars. — 2012 formsknightdoms