An officer enforcing customs laws.

plural of customs union

the value of an item going through customs, as used to determine the duties levied

plural of custom house

plural of heir by custom

(law) One whose right to inherit as heir is determined by customary modes of descent, such as gavelkind.

A group of customers and/or consumers that a business serves.

plural of customer base

(Ireland, historical) A custom that gave tenants of Ulster in Ireland a reasonable expectation of security of tenure as long as they paid their rent, and allowed them to sell the right to occupy their holding to another tenant acceptable to the landlord.

The way something is generally done.