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): --
Researchers at Cardiff University, Wales, have uncovered evidence of wildfires burning more than 419 million years ago.
We are half an hour from Cardiff and two and a half hours from London along the M4.
Saturday's rugby match between Ireland and Wales in Cardiff was canceled.
The Prime Minister addressed the legislature of Wales in Cardiff.