## EnglishEdit

### NounEdit

**countable additivity** (*uncountable*)

- (analysis) The following property of a measure: that the measure of a countable union of disjoint sets is equal to the sum of their measures.

**countable additivity** (*uncountable*)

- (analysis) The following property of a measure: that the measure of a countable union of disjoint sets is equal to the sum of their measures.