(of something solid) Having an empty space or cavity inside. / (of a sound) Distant, eerie; echoing, reverberating, as if in a hollow space; dull, muffled; often low-pitched.

plural of car park

plural of span iron

(archaic) One falsely claiming to possess medical or other skills, especially one who dispenses potions, ointments, etc., supposedly having curative powers; a quack.