1. The government department responsible for collecting tariffs and for controlling the flow of goods into and out of a country
   "All imported goods must be declared to customs"
    
2. Duties or tax charged on goods imported into a country
   "They had to pay customs duty on the imported luxury goods";
   - customs duty, custom, impost
    
3. A customs office or checkpoint
   "We had to stop at customs to declare our purchases"

1. Accepted or habitual practice
   "The custom of removing shoes before entering the house is common in many cultures";
   - usage, usance [archaic]
    
2. A specific practice of long standing
   "The custom of exchanging gifts at Christmas is widespread";
   - tradition
    
3. Habitual patronage
   "I have given this tailor my custom for many years"

Type of: duty, patronage, pattern, practice, survival, tariff, trade

Encyclopedia: Customs, immigration and quarantine