coxswainPronunciation: /ˈkɒks(ə)n/Translate coxswain | into Italian Definition of coxswain noun the person who steers a ship’s boat, racing boat, or other boat. the helmsman and skipper of a lifeboat. the senior petty officer in a small ship or submarine in the Royal Navy. Origin: Middle English: from obsolete cock (see cockboat) + swain. Compare with boatswaincoxswain in other Oxford dictionaries Definition of coxswain in the US English dictionary