on
board
1
located or provided on a ship, aircraft, or other vehicle
- The on-board doctor checked passengers throughout the flight.
- They serve meals through an on-board kitchen.
- The train's on-board Wi-Fi was unexpectedly fast.
- On-board safety equipment must be inspected before takeoff.
- The cruise ship's on-board entertainment included live shows.
2
built into or functioning within a main system or device, especially in electronics
- The phone has 128GB of on-board storage.
- This laptop uses an on-board graphics card.
- The on-board processor handles basic tasks smoothly.
- On-board diagnostics alert drivers to engine issues.
- The robot navigates with help from on-board sensors.