Abaft (&adot_;b&adot_;ft), prep. [Pref. a- on + OE. baft, baften, biaften, AS. beæftan; be by + æftan behind. See After, Aft, By.] (Naut.) Behind; toward the stern from; as, abaft the wheelhouse.[1913 Webster]
Abaft the beam. See under Beam.[1913 Webster]
Abaft, adv. (Naut.) Toward the stern; aft; as, to go abaft.[1913 Webster]