national costume
noun /ˌnæʃnəl ˈkɒstjuːm/
/ˌnæʃnəl ˈkɑːstuːm/
[countable, uncountable] (also national dress [uncountable])
- the clothes traditionally worn by people from a particular country, especially on special occasions or for formal ceremonies
- Some of the singers wore the Welsh national costume.