D defs.my
Entry 1 sense Webster, 1913

Abeam

· A·beam · IPA /əˈbim/
01 adv. On the beam, that is, on a line which forms a right angle with the ship's keel; opposite to the center of the ship's side.
  1. 1.
    On the beam, that is, on a line which forms a right angle with the ship's keel; opposite to the center of the ship's side.(Naut.)