Term: Inboard engine Image: [{"name":"images\/public\/dictionary\/Inboard engine_t9yuc1ms.jpg","usrName":"Inboard engine.jpg","size":19354,"type":"image\/jpeg","thumbnail":"images\/public\/dictionary\/thInboard engine_jvkjpa2h.jpg","thumbnail_type":"image\/jpeg","thumbnail_size":19354,"searchStr":"Inboard engine.jpg,!:sStrEnd"}] Definition: An internal combustion engine often mounted amidships that runs a drive shaft through the hull bottom.