- behind a ship or aircraft: a keg bobbed up astern
- aft: not a nautical usage
- backward; in a reverse direction: full speed astern
Origin of asterna- + stern
- Behind a vessel.
- At or to the stern of a vessel.
- With or having the stern foremost; backward.
(comparative more astern, superlative most astern)
- (nautical) behind
- Within the ship, the corresponding adjective is abaft. An object nearer the stern than the mainmast is abaft the mainmast.
a- + stern