The third gear of an engine.

(historical) Germany under the Nazi regime, beginning in January 1933 and ending in May 1945.

Alternative letter-case form of third way

(baseball) The base after second base in a counter-clockwise path around a baseball infield. / (blackjack) The betting spot located immediately to the right of the dealer, which is last to act.

(baseball) The infield defensive player that stands near third base.

(cricket) the session of a day's play between tea and close of play

(informal) Intensive rough interrogation in order to extract information or a confession

(UK, military, nautical, historical) Of a Royal Navy ship of the line in the Napoleonic Era: having 64–80 guns across two gun decks, a complement of 500–650, and weighing approximately 1,750 tons burthen.

(UK, military, nautical, historical) A third-rate ship of the line.

(US) A reduced-rate mail service for printed matter. / (Britain, historical) The cheapest accommodation on a train or ship.