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lowest common denominator

lowest common denominatornoun
lowest common denominator
Learner's definition of LOWEST COMMON DENOMINATOR  
mathematics : the smallest number that can be divided exactly by all the numbers below the lines in a group of two or more fractions
— called also "US"least common denominator
disapproving — used to say that the quality of something is poor because it is designed or intended to appeal to the largest possible number of people
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