A more thorough explanation:

Definition: Consuetudo is a Latin word that means "custom." It refers to a long-established practice or usage that is considered a law. It can also mean a duty or tax.

• In some countries, it is consuetudo to bow when greeting someone.
• The consuetudo of wearing black to a funeral is a long-standing tradition.
• Consuetudo can also refer to a tax that is imposed on goods or services.

The examples illustrate how consuetudo refers to a long-established practice or usage that is considered a law. In the first example, bowing when greeting someone is a custom that is considered polite and respectful. In the second example, wearing black to a funeral is a tradition that has been followed for many years. In the third example, consuetudo refers to a tax that has been imposed for a long time.