astern (adv.)stern foremost or backward;
the steamer went astern at half speed
astern (adv.)at or near or toward the stern of a ship or tail of an airplane;
the captain looked astern to see what the fuss was about
astern (adv.)(of a ship or an airplane) behind;
we dropped her astern on the end of a seven-inch manilla, and she laid comfortably on the ebb tide