noun
plural -toms
an action or way of behaving that is usual and traditional among the people in a particular group or place [count]
[singular] :something that is done regularly by a person
customs [plural]
taxes or fees that are paid to the government when goods come into or go out of a country - often used before another noun
the place at an airport, border, etc., where government officers collect customs on goods and look for things that people are trying to bring into a country illegally
[noncount] Brit formal :the practice of regularly going to the same shop or business to buy things or services
adjective
always used before a noun
chiefly US
made to fit the needs or requirements of a particular person
doing work that fits the needs or requirements of a particular person