The term 'MOTHER' (Cub Scout Leader) can be summarized as a leader of a Cub Scout DEN, which is a group of up to eight boys or girls aged between 8 and 10. The acronym for this position is DEN, which stands for Denner, a title given to the leader of the DEN. The role of the MOTHER is to provide guidance and support to the members of the DEN, helping them to develop their skills and knowledge in a safe and fun environment.