[ in-bawrd-out-bawrd, in-bohrd-out-bohrd ]
/ ˈɪnˌbɔrdˈaʊtˌbɔrd, ˈɪnˌboʊrdˈaʊtˌboʊrd /


Also outdrive, stern-drive. (of a motorboat) having an inboard engine connected to a maneuverable outboard drive-shaft unit.

noun Also called outdrive, stern drive.

an inboard-outboard motor.
a boat equipped with such a motor. Abbreviation: I/O Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019