What is over the side of a ship; hence, from on board of a ship, into the water; as, to fall overboard. To throw overboard, to discard; to abandon, as a dependent or friend called?

overboard — Over the side of a ship; hence, from on board of a ship, into the water; as, to fall overboard. To throw overboard, to discard; to abandon, as a dependent or friend. (Webster's 1913.)

Sources