/'kʌstəmz/ plural noun
the government department which organises the collection of taxes on imports, or an office of this department at a port or airport
He was stopped by customs.
Her car was searched by customs.
to go through customs to pass through the area of a port or airport where customs officials examine goods
to take something through customs to carry something illegal through a customs area without declaring it
the crates had to go through a customs examination the crates had to be examined by customs officials

Dictionary of banking and finance. 2015.