A cry or call uttered to arrest attention; also, an exclamation of satisfaction or exultation.In particular, a cry used to stop one who is passing, or to command a stop in some action; now, especially (also written whoa), a cry used to stop a horse or other draft-animal; used imperatively, stop! hold!n. A command to keep silence, or to cease from anything.n. Cessation; end; pause; intermission.To cry out; call out; hail.To stop; cease.A Middle English form of who.See he.The chemical symbol of holmium.