un·​paired | \ ˌən-ˈperd How to pronounce unpaired (audio) \

Definition of unpaired

: not paired: such as
a : not matched or mated
b : being an electron that does not share its orbital with another electron

Synonyms & Antonyms for unpaired



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Examples of unpaired in a Sentence

found an unpaired shoe in the back of the closet
Recent Examples on the Web Under normal circumstances, having an additional, unpaired electron exacts a cost on the system's total energy. John Timmer, Ars Technica, 15 Mar. 2022 The amino acids also scavenge free radicals—molecules with unpaired electrons that can damage proteins and DNA. Jea Morris, Smithsonian Magazine, 28 Jan. 2022 Kelsey, Deandra Kanu, Serena Chew, Victoria Larson and Victoria Paul were the unpaired women. Haley Kluge, Variety, 23 Aug. 2021 Shortly after the eggs hatched, an unpaired male decided to claim this as his territory. San Diego Union-Tribune, 15 May 2021 Hens and drakes pair up and spread out, looking to feed, roost, and loaf in places where they won’t be disturbed by unpaired males. Joe Genzel, Outdoor Life, 28 Aug. 2020 Charged molecules, systems with unpaired electrons and strange arrangements of atoms in otherwise common molecules have also been observed. Ryan C. Fortenberry, Scientific American, 1 Feb. 2020 Hillis’s slim handbook aimed to convince her reader that, with a stiff upper lip and a healthy dose of economic self-indulgence, being an unpaired woman could be not just tolerable but liberating. Ashley Fetters, Curbed, 20 June 2018 The final cells were large eggs with 23 unpaired chromosomes, ready to fuse with a sperm cell containing a complementary set. Marissa Fessenden, Smithsonian, 10 Feb. 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unpaired.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of unpaired

1598, in the meaning defined above

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Time Traveler for unpaired

Time Traveler

The first known use of unpaired was in 1598

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Cite this Entry

“Unpaired.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unpaired. Accessed 28 Jun. 2022.

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More Definitions for unpaired


un·​paired | \ ˌən-ˈpa(ə)rd, -ˈpe(ə)rd How to pronounce unpaired (audio) \

Medical Definition of unpaired

1a : not paired especially : not matched or mated
b : characterized by the absence of pairing electrons in the unpaired state
2 : situated in the median plane of the body an unpaired anatomical part also : not matched by a corresponding part on the opposite side


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