Definitions of aboard

1. On board of; as, to go aboard a ship.

2. On board or alongside of.

3. On board.

4. on first or second or third base; " Their second homer with Bob Allison aboard"

5. On board; into or within a ship or boat; hence, into or within a railway car.

6. Alongside; as, close aboard.

7. On or within a ship or railroad train.

8. Or prep., on board: in a ship. Used also of things on shore, as aboard a railway train, etc.

9. In a ship; in; on.

10. On board; alongside.

11. Within a ship or vessel. To go aboard, to embark. To fall aboard of, to strike a ship's side. To get aboard, get foul of.