plural quanta
ˈkwän-tə 
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
Pravir Malik, Forbes.com, 10 July 2025
No more fighting these quantum computing stocks, Rigetti too.
—Jim Cramer, CNBC, 2 July 2025
Daisy Dobrijevic, Space.com, 11 July 2025
However, from new tools that enable the design of quantum software to incredible innovation happening in space, quantum innovation possibilities are hopeful.
—David Dewalt, Forbes.com, 11 July 2025
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Noun
The Quantum Future Unveiled The convergence of photonic quantum computing and neutral atom arrays—when interpreted through the lens of the QIQD—charts a bold and expansive trajectory for the future of quantum technology.
—Pravir Malik, Forbes.com, 10 July 2025
No more fighting these quantum computing stocks, Rigetti too.
—Jim Cramer, CNBC, 2 July 2025
Adjective
New missions are being designed to process data directly in space using AI, quantum sensors and edge computing.
—Daisy Dobrijevic, Space.com, 11 July 2025
However, from new tools that enable the design of quantum software to incredible innovation happening in space, quantum innovation possibilities are hopeful.
—David Dewalt, Forbes.com, 11 July 2025
See All Example Sentences for quantum
Cite this Entry
“Quantum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quantum. Accessed 21 Jul. 2025.
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Medical Definition
quantum
noun
quan·tum
ˈkwänt-əm
plural quanta
ˈkwänt-ə
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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