1. a roofed or covered passageway or corridor, often with shops or displays on either side
Usage: often used in the names of shopping centers or arcades
2. a gallery or hall for displaying art or merchandise
Usage: less common in modern English; more prevalent in Italian and European contexts

Examples

• We walked through the galleria on a rainy day, browsing the shops.
• The shopping galleria features over 200 stores and restaurants.
• She spent the afternoon in the galleria looking at the art displays.
• The new galleria downtown has become a popular meeting spot.
• They met at the galleria's central atrium for lunch.