Disjoint reference

Disjoint reference occurs if two elements refer to different entities.

Example
in (i)a the reference of she and her is disjoint, and in (i)b that of she and them.

(i) a She likes her b She likes them

The case of (i)a is captured by the binding theory : since her is a pronominal it must obey condition B which says that she may not locally bind her. It is assumed that she and her must have disjoint reference as a consequence.

Link
Utrecht Lexicon of Linguistics