lowest common denominator noun
[noncount] 1 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 2 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 ▪ The movie appeals to the lowest common denominator. ▪ Television programming has sunk to the lowest common denominator.
