plen·ish \ˈplenish\transitive verb (-ed/-ing/-es) Etymology: Middle English (Scots dialect) plenyssen, from Middle French pleniss-, stem of plenir, from Old French, from plein, plen full, from Latin plenus — more at full 1. a.: to fill up b.chiefly dialect: replenish 2.chiefly Britain: to equip (a house or farm) with furnishings