/ˈkʌstəm/ – noun
Definition: 1. tục lệ, tập quán, thói quen, luật pháp theo tập quán;
2. snh thuế quan.
A more thorough explanation: In legal terms, “custom” refers to a long-established practice or behavior that has acquired the force of law within a particular community or society. Customary law is a source of law that is based on the traditional customs and practices of a specific group of people, and it is recognized and enforced by the legal system.
Example: The company has a strict policy regarding custom orders, requiring customers to sign a contract outlining the specific details and terms of the customization.