1. Industrial city (electrochemical and metallurgical products) and resort, capital of Pyrénées-Atlantiques département in Aquitaine, SW France, near the Spanish border; It is the center of the Basque area of France, and the site of fierce guerrilla activity.
2. River 100 miles (161 kilometers) SW France rising in the Pyrenees SW of Pau and flowing to the Adour — see GAVARNIE.