1. Of, in, or near the Atlantic Ocean. 2. Of, on, or near the eastern coast of the United States. 3. Of or concerning countries bordering the Atlantic Ocean, especially those of Europe and North America.
ETYMOLOGY:
Middle English Atlantik, from Latin (mare) Atlanticum, Atlantic (sea), from Greek (pelagos) Atlantikos, from Atls, Atlant-, Atlas, Mount Atlas (in west Africa, on which the heavens were believed to rest). See tel- in Appendix I.