Abaft

(6), prep. [Pref. a and A-S. bæftan, be-æftan, after, behind, from be, by, and æftan, after. Æftan, æfter, æft, after, behind, again, are all formed from the prep. af, of. See AFTER.] (Naut.) Toward the stern from; back of; farther back than.

Abæft the beam. See BEAM.