Top'-dress`ing noun The act of applying a dressing of manure to the surface of land; also, manure so applied. Found on http://www.encyclo.co.uk/webster/T/70
A blending term used to denote high quality malts that are known to marry well and are used to give a blended whisky a veneer of depth and character. Found on https://www.encyclo.co.uk/local/21396