Definition of denominator noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈnɒmɪneɪtə(r)//
; NAmE NAmE//ˈnɑːmɪneɪtər//
(mathematics) Mathematical terminology
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the number below the line in a fraction showing how many parts the whole is divided into, for example 4 in ¾ compare numerator, common denominator See related entries: Mathematical terminology Word Originmid 16th cent.: from French dénominateur or medieval Latin denominator, from denominare ‘to name’, from de- ‘away, formally’ + nominare ‘to name’.
See the Oxford Advanced American Dictionary entry: denominator