1. A fortified village: This is the original meaning of the word. Bastides were fortified settlements built in the 13th and 14th centuries in Southern France. They were often built on a rectangular grid plan with a central square and a church. Many of these bastides still exist today and are now popular tourist destinations.
2. A country house or villa: This is a more modern usage of the word. It can refer to a large, comfortable house in the countryside, often with a garden or grounds.
The context will usually make it clear which meaning is intended.
Examples:
* "La bastide de Monpazier est une ville fortifiée médiévale." (The bastide of Monpazier is a medieval fortified town.)
* "Ils ont acheté une bastide dans le Lubéron." (They bought a country house in the Luberon region.)