From Longman Dictionary of Contemporary Englishcommon denominatorˌcommon deˈnominator noun [countable] 1 MIan attitude or quality that all the different members of a group have The common denominator of both types of novel is the vulnerable threatened heroine.2 → the lowest common denominator3 HMN technical a number that can be divided exactly by all the denominators (=bottom number) in a set of fractions
Examples from the Corpus
common denominator• The common denominator in these two election campaigns was money. 