Approach-approach conflict refers to a conflict arising from having to choose between desirable alternatives. It is a conflict between two (2) desirable alternatives.
Other /More definition:
Approach-approach conflict refers to a conflict between two (2) equally pleasant alternatives or 2 attractive goals; choosing between two (2) positive, or desirable, alternatives. According to Lewin, Approach-approach conflict is the type of conflict that occurs when a person is attracted to two (2) goals at the same time.