aboar

adv. [ Pref. a- on, in + board. ] 1. On board; into or within a ship or boat; hence, into or within a railway car. [ 1913 Webster ]

2. Alongside; as, close aboard. [ 1913 Webster ]

(Naut.):
To fall aboard of, to strike a ship's side; to fall foul of. --
To haul the tacks aboard, to set the courses. --
To keep the land aboard, to hug the shore. --
To lay (a ship) aboard, to place one's own ship close alongside of (a ship) for fighting. [ 1913 Webster ]