From Longman Dictionary of Contemporary Englishlowest common denominatorˌlowest ˌcommon deˈnominator noun [uncountable] 1 EVERYONEthe biggest possible number of people, including people who are very easily influenced or are willing to accept low standards Television quiz shows often seem to target the lowest common denominator.2 technicalHMN the smallest number that the bottom numbers of a group of fractions can be divided into exactly → denominator
Examples from the Corpus
lowest common denominator• The band's vulgar lyrics appeal to the lowest common denominator.From Longman Business Dictionarylowest common denominatorˌlowest ˌcommon deˈnominator noun [singular] disapproving the biggest possible number of people, including people who are very easily influenced or are willing to accept low standardsMany advertisements are clearly appealing to the lowest common denominator. 