1. located on or toward the outside of a ship or aircraft
Usage: nautical; aviation
2. situated away from the center or main body

1. a portable motor that can be attached to the outside of a boat’s stern
Usage: nautical

Examples

• The outboard engine started on the first pull.
• Check the outboard fuel tank before we leave the dock.
• The plane’s outboard engines were running smoothly.
• He adjusted the outboard motor’s throttle.
• The outboard propeller hit something in the shallow water.
• We need to tilt the outboard up when we reach the beach.
• The boat came with a 25-horsepower outboard.