1. (n.) A cipher; nothing; naught.

2. (n.) The point from which the graduation of a scale, as of a thermometer, commences.

3. (n.) Fig.: The lowest point; the point of exhaustion; as, his patience had nearly reached zero.

absolute zero aught blank boiling point cipher concentrate on dew point duck dud dummy fix on focus on freezing point goose egg hollow man home in on insignificancy jackstraw lay figure man of straw melting point nada nadir naught nebbish nichts nihil nil nix no such thing nobody nonentity nothing nothing at all nothing on earth nothing whatever nought null nullity pinpoint puppet pushover recalescence point rock bottom temperature thing of naught trifle void whiffet whippersnapper zero in on zilch