WordReference Random House Unabridged Dictionary of American English © 2019
no•e•sis  (nō ēsis),USA pronunciation n. 
  1. Philosophy(in Greek philosophy) the exercise of reason.
  2. [Psychol.]cognition;
    the functioning of the intellect.
  • Greek nóēsis thought, intelligence, equivalent. to noē- (variant stem of noeîn to think) + -sis -sis
  • 1880–85

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