quantum

1 of 2

noun

quan·​tum ˈkwän-təm How to pronounce quantum (audio)
plural quanta ˈkwän-tə How to pronounce quantum (audio)
1
b
c
: gross quantity : bulk
2
a
: any of the very small increments or parcels into which many forms of energy are subdivided
b
: any of the small subdivisions of a quantized physical magnitude (such as magnetic moment)

quantum

2 of 2

adjective

1
: large, significant
a quantum improvement
2
: of, relating to, or employing the principles of quantum mechanics
quantum physics

Examples of quantum in a Sentence

Noun the sum of human knowledge is now so immense that even a highly educated person can hope to absorb only a tiny quantum of it
Recent Examples on the Web
Noun
Experts told the publication that the companies’ findings could prove scalable, but a lot of work still remains to make quantum computing an everyday reality. David Meyer, Fortune, 9 Apr. 2024 The countries and firms that develop quantum computing stand to gain a significant advantage in an array of lucrative industries, some experts told ABC News. Max Zahn, ABC News, 5 Apr. 2024 Now Microsoft and the quantum computing firm Quantinuum have announced a system that yields four logical qubits from just 30 physical qubits. IEEE Spectrum, 3 Apr. 2024 Some physicists and philosophers have taken this line of thinking to extreme lengths, arguing for a sort of quantum immortality. Paul M. Sutter, Discover Magazine, 3 Apr. 2024 Blood quantum Federally recognized as a U.S. tribe in 1978, there are 21,307 active Pascua Yaqui Tribe members, according to a Sept. 1 Facebook post by the tribe. Jose R. Gonzalez, The Arizona Republic, 30 Mar. 2024 As quantum computing is about to become a reality, the importance of open source cannot be overstated. Matthias Pfau, Forbes, 29 Mar. 2024 With the complications of mast cell activation syndrome, including drops in blood pressure, flushing, severe itching and rashes, Ms. Banks relied on alternative therapies, including reiki, hypnosis, emotional freedom technique, quantum healing and regression therapy. Alex Williams, New York Times, 27 Mar. 2024 Organizations will explore quantum algorithms and applications. Steve Andriole, Forbes, 27 Mar. 2024
Adjective
Instead of branching off from every quantum possibility, this multiverse just generates all the possibilities on its own. Paul M. Sutter, Discover Magazine, 3 Apr. 2024 Previous research suggested that such quantum error-correction strategies could require at least 1,000 physical qubits per logical qubit. IEEE Spectrum, 3 Apr. 2024 The quantum threat is a global challenge that requires a collaborative response. Matthias Pfau, Forbes, 29 Mar. 2024 All steps of a quantum computation must happen within that time frame. Philip Ball, Quanta Magazine, 25 Mar. 2024 The physical qubits that make up each virtual qubit are like those oblivious quantum spies. Ben Brubaker, WIRED, 17 Mar. 2024 More important than anything is creating awareness of upcoming changes and fostering a mindset shift among the leadership team in terms of the life cycle of quantum projects. Expert Panel®, Forbes, 1 Mar. 2024 This approach leverages two optical degrees of freedom—time state and phase state—to encode information in quantum states. IEEE Spectrum, 25 Jan. 2024 Her writing focuses on quantum physics, quantum technology, deep technology, social media, and the diversity of people in these fields, particularly women and people from minority ethnic and racial groups. Kenna Hughes-Castleberry, Ars Technica, 14 Dec. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'quantum.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Noun

Latin, neuter of quantus how much

First Known Use

Noun

1567, in the meaning defined at sense 1a

Adjective

1942, in the meaning defined at sense 1

Time Traveler
The first known use of quantum was in 1567

Dictionary Entries Near quantum

Cite this Entry

“Quantum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quantum. Accessed 16 Apr. 2024.

Kids Definition

quantum

1 of 2 noun
quan·​tum ˈkwänt-əm How to pronounce quantum (audio)
plural quanta ˈkwänt-ə How to pronounce quantum (audio)
: the smallest amount of many forms of energy (as light)

quantum

2 of 2 adjective
: of or relating to the principles of quantum theory
quantum physics

Medical Definition

quantum

noun
quan·​tum ˈkwänt-əm How to pronounce quantum (audio)
plural quanta ˈkwänt-ə How to pronounce quantum (audio)
1
: one of the very small increments or parcels into which many forms of energy are subdivided
a molecule of rhodopsin in the human eye can cause a response to a single quantum of light
2
: one of the small molecular packets of a neurotransmitter (as acetylcholine) released into the synaptic cleft in the transmission of a nerve impulse across a synapse

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