Entry 2 senses · 2 variants Webster, 1913 Larboard · Lar·board · IPA /ˈlɑɹbɔɹd/ n. a. 01 n. The left-hand side of a ship to one on board facing toward the bow; port; -- opposed to starboard. 1. The left-hand side of a ship to one on board facing toward the bow; port; -- opposed to starboard.(Naut.) 02 a. On or pertaining to the left-hand side of a vessel; port; as, the larboard quarter. 1. On or pertaining to the left-hand side of a vessel; port; as, the larboard quarter.