Bourse/bʊrs/ Definition 1 of 3Pro Tip 1/3Cultural Association Bourse refers to stock exchanges mainly in French-speaking or European contexts. He invests through the Brussels bourse. Pro Tip 2/3Not Always Paris While 'Paris bourse' is common, other cities have bourses too, such as Amsterdam. The Amsterdam bourse closed higher today. Pro Tip 3/3Specific Indexes Each bourse has main indexes, like the CAC 40 for France, which are important for traders. The main index of the French bourse is performing well.