1. apartments on one floor of a building
Usage: British
2. shoes with very low heels or no heels
3. areas of level ground, especially near water

Examples

• She lives in a block of flats in London.
• I prefer wearing flats to high heels for comfort.
• The river flows through the muddy flats near the coast.
• The pianist played several flats in that piece.
• The crew moved the painted flats backstage after the performance.
• These flats are much easier to walk in than stilettos.
• Salt flats stretch for miles across the desert landscape.