What is the definition for liquid?

A liquid is a state of matter that has a definite volume but no definite shape. This means that a liquid will take the shape of its container, but it won't expand to fill the entire container like a gas.

Here are some key characteristics of liquids:

* Fluidity: Liquids can flow and change shape easily due to the weak attraction between their molecules.

* Density: Liquids are denser than gases but less dense than solids.

* Compressibility: Liquids are only slightly compressible, meaning their volume changes minimally under pressure.

* Surface tension: Liquids exhibit surface tension, which is a force that holds the surface molecules together.

Some examples of liquids include water, oil, and mercury.