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Houghton Mifflin

mas·sif  audio  (m-sf) KEY 

NOUN:
  1. A large mountain mass or compact group of connected mountains forming an independent portion of a range.
  2. A large section or block of the earth's crust that is more rigid than the surrounding rock and has been moved or displaced as a unit.

ETYMOLOGY:
French, massive, massif, from Old French ; see massive


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