名詞 outboard:

1. a motorboat with an outboard motor
   同義詞：outboard motorboat
2. internal-combustion engine that mounts at stern of small boat
   同義詞：outboard motor

形容詞 outboard:

1. located away from the midline of a vessel or aircraft

1. A boat with an outboard motor.
   尾掛機船裝有舷外發(fā)動機的船

out.board

adj.（形容詞）
Nautical
【航海】
Situated or positioned outside the hull of a vessel.
舷外的：位于或處于船體之外的
Being in a position that is away from the center line of the hull of a ship.
舷外的：位于偏離船體主線位置的
Situated or positioned toward or nearer the end of a wing of an aircraft.
外端的：位于或處于朝向或接近飛機機翼端處的
n.（名詞）
An outboard motor.
舷外發(fā)動機
A boat with an outboard motor.
尾掛機船：裝有舷外發(fā)動機的船

【引伸】
out.board.
adv.（副詞）