1. Definite Volume, Indefinite Shape: Liquids take up a specific amount of space (volume) but can flow and take the shape of their container.

2. Fluidity: Liquids can flow and move freely. This is due to their molecules having weaker attractions to each other than solids.

3. Compressibility: Liquids are slightly compressible, meaning their volume can be reduced slightly under pressure. However, they are much less compressible than gases.