Pronunciation: (u-sō'shē-ā"tiv, -sē-, -shu-tiv),[key] —adj. 1. pertaining to or resulting from association.
2. tending to associate or unite.
3. Math.,Logic. a. (of an operation on a set of elements) giving an equivalent expression when elements are grouped without change of order, as (a + b) + c = a + (b + c).
b. having reference to this property: associative law of multiplication.