quantum
nounUK /ˈkwɒntəm/
US /ˈkwɑːntəm/
A quantum is the smallest little bit of energy or matter that can exist.
Scientists study a quantum of light to understand how energy works.
OTHER MEANINGS
2. A specific amount or quantity of something.
The team received a quantum of funding for the project.
3. A sudden, significant change or increase.
The new policy led to a quantum leap in productivity.
4. Relating to the branch of physics that deals with tiny particles.
Quantum mechanics explains how electrons behave around atoms.