Webster's Revised Unabridged Dictionary · 1913

Larboard

Larboard , noun

[Lar- is of uncertain origin, possibly the same as lower, that is, humbler in rank, because the starboard side is considered by mariners as higher in rank; compare Dutch laag low, akin to English low. See Board, n., 8.]

(Nautical) The left-hand side of a ship to one on board facing toward the bow; port; -- opposed to starboard.

Larboard is a nearly obsolete term, having been superseded by port to avoid liability of confusion with starboard, owing to similarity of sound.

Larboard , adjective

On or pertaining to the left-hand side of a vessel; port; as, the larboard quarter.