Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Greek
Origin: dichotomia, from dichotomos 'cut in two'

dichotomy

noun
     
di‧chot‧o‧my plural dichotomies [countable] formal
the difference between two things or ideas that are completely opposite
dichotomy between
a dichotomy between his public and private lives

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