Word Origin & History
mid-14c., "the chief residence of a lord," from O.Fr. mansion, from L. mansionem (nom. mansio) "a staying, a remaining, night quarters, station," from manere "to stay, abide," from PIE *men- "to remain, wait for" (cf. Gk. menein "to remain," Pers. mandan "to remain"). Sense of "any large and stately
house" is from 1510s.