What is a space entirely devoid matter?

A space entirely devoid of matter is known as a vacuum. In such a vacuum, there are no particles, atoms, or molecules, meaning it lacks any physical substance. While perfect vacuums are theoretical and hard to achieve, even the best approximations still contain some residual particles and energy fluctuations. This concept is crucial in fields like physics and astronomy, as it helps scientists understand the behavior of light, radiation, and fundamental forces in the absence of matter.