■ noun
1》 a traditional and widely accepted way of behaving or doing something that is specific to a particular society, place, or time.
↘ Law established usage having the force of law or right.
2》 Brit. regular dealings with a shop or business by ~ers.
Origin
ME: from OFr. coustume , based on L. consuetudo , from consuetus , past participle of consuescere 'ac~'.