Atlantean

[ at-lan-tee-uh n, -luh n- ]
/ ˌæt lænˈti ən, -lən- /

adjective

pertaining to the demigod Atlas.
having the strength of Atlas: He was of monumental girth and Atlantean power.
pertaining to Atlantis.

Origin of Atlantean

1660–70; < Latin Atlantē(us) (< Greek Atlánteios of Atlas, equivalent to Atlant-, stem of Átlās + -eios adj. suffix) + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for atlantean

Atlantean
/ (ˌætlænˈtiːən, ætˈlæntɪən) /

adjective

literary of, relating to, or like Atlas; extremely strong
of or connected with Atlantis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012