Term: Trimaran Image: [{"name":"images\/public\/dictionary\/Trimaran_e398ikwf.jpg","usrName":"Trimaran.jpg","size":270724,"type":"image\/jpeg","thumbnail":"images\/public\/dictionary\/thTrimaran_fej90k3x.jpg","thumbnail_type":"image\/jpeg","thumbnail_size":36682,"searchStr":"Trimaran.jpg,!:sStrEnd"}] Definition: A type of boat with three side-by-side hulls, the center of which is usually larger with crew accommodations.