- on board; on, in, or into a ship, airplane, etc.
- Naut. alongside: the sailboat passed our ship close aboard
- as a participant, partner, employee, etc.: usually in the phrases come aboard and welcome aboard
Origin of aboardMiddle English abord from Old French a bord: see board
- get on! get in!: a warning to passengers that the train, car, airplane, etc. will start soon
- everyone (is) aboard!: a signal to the driver or pilot that the trip may begin