Definition

1. Adjective:

   • Located on, mounted on, or directed toward the outside of a vessel or aircraft: Describes something positioned away from the central line or hull.
   • Having an external motor mounted on the stern of a boat: Describes a boat equipped with a detachable motor fixed to its rear.

2. Noun:

   • An outboard motor: A portable internal-combustion engine with a propeller, designed to be mounted on the stern (rear) of a small boat.
   • A boat equipped with an outboard motor: A motorboat powered by such an engine.

Examples of Usage

• Adjective:

  • The outboard fuel tanks were jettisoned first. (The fuel tanks located on the outside of the aircraft were discarded first.)
  • We rented an outboard motorboat for the day. (We rented a boat with an externally mounted motor for the day.)

• Noun:

  • He started the outboard and steered away from the dock. (He started the external motor and steered away from the dock.)
  • The fisherman's small outboard was perfect for the lake. (The fisherman's small boat with an external motor was perfect for the lake.)

Advanced Usage

• "Outboard of": A prepositional phrase meaning situated farther out from the center than something else.
  • The lifeboats are stored outboard of the main superstructure. (The lifeboats are stored in a position farther from the center than the main superstructure.)

Variants and Related Words

• Outboard motor (n): The specific engine unit mounted on a boat's stern. Often shortened to "outboard."
• Outdrive (n): The lower unit of a sterndrive (inboard/outboard) boat engine, which is mounted outside the hull. (Note: This is a related but distinct marine propulsion system.)

Synonyms

• External: Located on the outside.
• Stern-mounted: Attached to the rear of a boat (specifically for motors).

Antonyms

• Inboard: Located inside the hull of a vessel; an engine mounted within the boat.

Adjective

1. located away from the midline of a vessel or aircraft
   • the outboard section of a wing
   • outboard rigging

Noun

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