D defs.my
Entry 2 senses Webster, 1913

Astern

· A·stern · IPA /əˈstɝn/
01 adv. In or at the hinder part of a ship; toward the hinder part, or stern; backward; as, to go astern.
  1. 1.
    In or at the hinder part of a ship; toward the hinder part, or stern; backward; as, to go astern.(Naut.)
  2. 2.
    Behind a ship; in the rear.
Phrases & compounds
To bake astern — to go stern foremost.
To be astern of the reckoning — to be behind the position given by the reckoning.
To drop astern — to fall or be left behind.
To go astern — to go backward, as from the action of currents or winds.