What does quantum mean?

Definitions for quantum
ˈkwɒn təmquan·tum

This dictionary definitions page includes all the possible meanings, example usage and translations of the word quantum.

Princeton's WordNet

  1. quantumnoun

    a discrete amount of something that is analogous to the quantities in quantum theory

  2. quantumnoun

    (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory)


  1. quantumnoun

    The total amount of something; quantity.

  2. quantumnoun

    The amount or quantity observably present, or available.

  3. quantumnoun

    The smallest possible, and therefore indivisible, unit of a given quantity or quantifiable phenomenon.

  4. quantumadjective

    Of a change, sudden or discrete, without intermediate stages.

  5. quantumadjective

    Of a change, significant.

  6. quantumadjective

    Involving quanta

  7. quantumadjective

    Relating to a quantum computer

  8. Etymology: From quantum, noun use of neuter form of quantus.

Samuel Johnson's Dictionary

  1. QUANTUMnoun

    The quantity; the amount.

    Etymology: Latin.

    The quantum of presbyterian merit, during the reign of that ill-advised prince, will easily be computed. Jonathan Swift.



    The Office of Tailored Access Operations (TAO), now Computer Network Operations, and structured as S32, is a cyber-warfare intelligence-gathering unit of the National Security Agency (NSA). It has been active since at least 1998, possibly 1997, but was not named or structured as TAO until "the last days of 2000," according to General Michael Hayden.TAO identifies, monitors, infiltrates, and gathers intelligence on computer systems being used by entities foreign to the United States.


  1. quantum

    Quantum refers to the branch of physics that deals with phenomena and properties at the smallest level of particles and energy, known as the quantum level. It involves the study of the behavior and interactions of particles such as atoms, electrons, and photons, which exhibit quantum properties such as superposition, entanglement, and uncertainty. Quantum theory provides a mathematical framework to understand and describe these phenomena, often contrasting with classical physics.

Webster Dictionary

  1. Quantumnoun

    quantity; amount

  2. Quantumnoun

    a definite portion of a manifoldness, limited by a mark or by a boundary

  3. Etymology: [L., neuter of quantus how great, how much. See Quantity,]


  1. Quantum

    In physics, a quantum is the minimum amount of any physical entity involved in an interaction. Behind this, one finds the fundamental notion that a physical property may be "quantized," referred to as "the hypothesis of quantization". This means that the magnitude can take on only certain discrete values. There is a related term of quantum number. An example of an entity that is quantized is the energy transfer of elementary particles of matter through bosons and of photons. A photon is a single quantum of light, and is referred to as a "light quantum". The energy of an electron bound to an atom orbital is said to be quantized, which results in the stability of atoms, and of matter in general. As incorporated into the theory of quantum mechanics, this is regarded by physicists as part of the fundamental framework for understanding and describing nature at the infinitesimal level. Normally quanta are considered to be discrete packets with energy stored in them. Max Planck considered these quanta to be particles that can change their form. This phenomenon can be observed in black-body radiation during temperature fluctuation.

Chambers 20th Century Dictionary

  1. Quantum

    kwon′tum, n. quantity: amount:—pl. Quan′ta.—Quantum sufficit—as much as is sufficient. [L. quantum, neut. of quantus, how great.]

Editors Contribution

  1. quantumadjective

    An amount of energy or data expressed as a quantity

    Quantum mechanisms work efficiently when they are thought through simply

    Submitted by MaryC on April 15, 2023  

  2. Quantum

    An amount of energy or data expressed as a quantity.

    Quantum computing is progressing towards reality.

    Submitted by anonymous on May 29, 2017  

Suggested Resources

  1. quantum

    Song lyrics by quantum -- Explore a large variety of song lyrics performed by quantum on the Lyrics.com website.

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How to pronounce quantum?

How to say quantum in sign language?


  1. Chaldean Numerology

    The numerical value of quantum in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of quantum in Pythagorean Numerology is: 8

Examples of quantum in a Sentence

  1. Albert Einstein:

    Quantum mechanics is certainly imposing. But an inner voice tells me that it is not yet the real thing. The theory says a lot, but does not really bring us closer to the secret of the 'Old One.' I, at any rate, am convinced that He is not playing at dice.

  2. Alvin Toffler:

    Humanity faces a quantum leap forward. It faces the deepest social upheaval and creative restructuring of all time. Without clearly recognizing it, we are engaged in building a remarkable new civilization from the ground up. This is the meaning of the Third Wave.

  3. Michael Edelman:

    Quantum dots require a tiny amount of energy to operate, whenever you have a material that gives off a very bright pure light with a tiny amount of energy, people start getting excited.

  4. Anthony Barnosky:

    But I'm optimistic in the sense that humans react -- in the past we have made quantum leaps when we worked together to solve our problems.

  5. Tom Clare:

    There is a quantum of information available to Douglas Daniels by the time Douglas Daniels made these statements, douglas Daniels made the preconceived notion that the election was stolen.

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Translations for quantum

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