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
Michael Barclay, Quartz, 7 May 2025
Funding would be maintained for AI and quantum computing.
—John Timmer, ArsTechnica, 2 May 2025
Forbes.com, 9 May 2025
Some locate it in high-level activity like dynamic coordination between certain regions of the brain; others, like me, locate it at the smallest layer of reality—in the quantum fabric of spacetime itself.
—Susan Schneider, Scientific American, 1 May 2025
See All Example Sentences for quantum
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Noun
Entanglement is when two particles are connected even over a vast range, via quantum teleportation.
—Michael Barclay, Quartz, 7 May 2025
Funding would be maintained for AI and quantum computing.
—John Timmer, ArsTechnica, 2 May 2025
Adjective
As Maryland students better prepare for a quantum computing era, Maryland companies will be better able to hire and retain local citizens, who will in turn help define what the future of quantum looks like.
—Forbes.com, 9 May 2025
Some locate it in high-level activity like dynamic coordination between certain regions of the brain; others, like me, locate it at the smallest layer of reality—in the quantum fabric of spacetime itself.
—Susan Schneider, Scientific American, 1 May 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 17 May. 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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