I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: motor (I) + boat
1. : a boat or small ship propelled by an internal-combustion engine or an electric motor
2. : any of certain classes of boats according to statute (as a boat not more than 65 feet long propelled by machinery) except steam-propelled tugboats and towboats
II. intransitive verb
1. : to ride in or drive a motorboat
2. : to make sounds resembling the exhaust of a motorboat