(a) Flat, level, even; of geographic areas: low in elevation, lowland; broad, flat; also, of an engraving: worked in low relief; plain contre (ground, place, thing), a plain, plateau, or lowland……

(a) A preliminary act or operation, a previous setting in order; also, a precautionary measure; (b) med. & surg. the action or process of preparing a wound, an injury, etc., for treatment; the action……