Define the term degrees of freedom.

Explanation

The minimum number of independent coordinates needed to specify the position and connguration of a thermo-dynamical system in space is called the degree of freedom of the system.
Example:
1. A free particle moving along x-axis needs only one coordinate to specify it completely. So its degree of freedom is one.
2. Similarly a particle moving over a plane has two degrees of freedom.
3. A particle moving in space has three degrees of freedom.