noun
or vav·a·sour also vav·as·sor ˈvavəˌsȯ(ə)r, -su̇(-, -sō(- ; or val·va·sor or val·vas·sor ˈvalv-
( -s )
Etymology: Middle English vavasour, from Old French vavassor, vavassour, probably from Medieval Latin vassus vassorum vassal of vassals, from vassus vassal vassorum of vassals, gen. plural of vassus — more at vassal
: a feudal tenant ranking directly below a peer or baron