n. & v. Naut. & Aeron.
n. the right-hand side (looking forward) of a ship, boat, or aircraft (cf. PORT(3)).
v.tr. (also absol.) turn (the helm) to starboard. starboard tack see TACK(1) 4. starboard watch see WATCH n. 3b.
[ OE steorbord = rudder side (see STEER, BOARD), early Teutonic ships being steered with a paddle over the right side ]