0 a city in southern Wales that is the capital city of Wales, and is also a principal area (= an area with its own local government):
The Prime Minister addressed the legislature of Wales in Cardiff.
Saturday's rugby match between Ireland and Wales in Cardiff was canceled.
We are half an hour from Cardiff and two and a half hours from London along the M4.
Researchers at Cardiff University, Wales, have uncovered evidence of wildfires burning more than 419 million years ago.
