whaleboat Syllabification: (whale·boat)Pronunciation: /ˈ(h)wālˌbōt/Definition of whaleboat noun a long rowboat with a bow at either end for easy maneuverability, formerly used in whaling. a boat similar to a whaleboat used as a ship’s lifeboat and utility boat. whaleboat in other Oxford dictionaries Definition of whaleboat in the British & World English dictionary