Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
astern is an adverb meaning "stern foremost or backward". It carries 3 recorded senses.
stern foremost or backward
“the steamer went astern at half speed”
(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”
ship · airplane
Definitions, synonyms and semantic relations for astern come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.