den-mother den·mot·her uncommon noun 1. someone who plays the role of a den mother “he serves as den mother to all the freshmen in this dormitory” “she” 2. a woman who supervises a den of Cub Scouts Synonymsden mother Related words Word family den-mother Broader terms chaperonsupervisor WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.