quantum

/ˈkwɑntəm/
noun
  1. A very small, discrete amount or unit of something, especially energy.
    • The scientist studied how a quantum of energy is absorbed by an atom.
    • A photon is a quantum of light energy.
    • In physics class, we learned that a quantum is the smallest possible unit of a physical property.
  2. A significant or sudden change or leap.
    • The new technology represents a quantum leap in computing power.
    • The company's profits took a quantum step forward after the merger.
    • Her understanding of the subject made a quantum jump after she read the advanced textbook.
Synonyms
adjective
  1. Relating to the branch of physics that deals with very small particles and discrete units of energy.
    • She is taking a course on quantum theory this semester.
    • Quantum mechanics explains how particles behave at the atomic level.
    • The lab is working on quantum computing, which uses qubits instead of regular bits.
  2. Very large or significant; dramatic.
    • The team made a quantum gain in efficiency after the reorganization.
    • There has been a quantum improvement in the quality of the product.
    • The new policy led to a quantum increase in sales.