an established socially accepted practice
It is a custom more honoured in the breach than the observance
long-established practice having the force of law
the usual practice of an individual
sleeping within my orchard, my custom always of the afternoon — Shakespeare
the usages that regulate social life
(in pl)
duties or tolls imposed on imports or exports
(treated as sing. or pl) the agency, establishment, or procedure for collecting such duties customs
chiefly Brit business patronage
threaten to withdraw one's custom
[Middle English custume via Old French from Latin consuetudin-, consuetudo, from consuescere to accustom, from con- + suescere to become accustomed]