abeamPronunciation: /əˈbiːm/Definition of abeam adverb on a line at right angles to a ship’s or an aircraft’s length: the lighthouse was abeam at noon (abeam of) opposite the middle of (a ship or aircraft):she was lying almost abeam of us [as preposition]:before I knew it, I was abeam the shipOrigin: mid 19th century: from a-2 (expressing general direction) + beamabeam in other Oxford dictionaries Definition of abeam in the US English dictionary