Webster's Revised Unabridged Dictionary · 1913

Aboard

Aboard ({not transcribed}) , adverb

[Prefix a- on, in + board.]

1.
On board; into or within a ship or boat; hence, into or within a railway car.
2.
Alongside; as, close aboard.
Collocations (4)
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.

Aboard , preposition

1.
On board of; as, to go aboard a ship.
2.
Across; athwart. [Obsolete]
Nor iron bands aboard The Pontic Sea by their huge navy cast. — Spenser