unnatural

adjective

un·​nat·​u·​ral ˌən-ˈna-chə-rəl How to pronounce unnatural (audio)
-ˈnach-rəl
1
: not being in accordance with nature or consistent with a normal course of events
2
a
: not being in accordance with normal human feelings or behavior : perverse
b
: lacking ease and naturalness : contrived
her manner was forced and unnatural
c
: inconsistent with what is reasonable or expected
an unnatural alliance
unnaturally
ˌən-ˈna-chə-rə-lē How to pronounce unnatural (audio)
-ˈnach-rə-
-ˈna-chər-
adverb
unnaturalness noun
Choose the Right Synonym for unnatural

irregular, anomalous, unnatural mean not conforming to rule, law, or custom.

irregular implies not conforming to a law or regulation imposed for the sake of uniformity in method, practice, or conduct.

concerned about his irregular behavior

anomalous implies not conforming to what might be expected because of the class or type to which it belongs or the laws that govern its existence.

her drive made her an anomalous figure in a sleepy organization

unnatural suggests what is contrary to nature or to principles or standards felt to be essential to the well-being of civilized society.

prisoners treated with unnatural cruelty

Examples of unnatural in a Sentence

It seems unnatural to keep the bird in a cage. She has an unnatural obsession with money. Her smile looked forced and unnatural.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The case is one of hundreds in the Medieval Murder Maps database, which uses coroners' rolls to track real cases of unnatural death in 14th-century England—now mapped across cities like London, Oxford, and York. Alice Gibbs, MSNBC Newsweek, 9 June 2025 With tensions already flaring, a nightmarish encounter with a mysterious, unnatural force threatens to corrupt their lives, their love, and their flesh. Alison Foreman, IndieWire, 5 June 2025 Outside of that feels unnatural to me at the moment. Michael Schneider, Variety, 4 June 2025 But right now, after finishing two months of my medication, my hair is coming out in an unnatural amount of clumps. Shania Russell, EW.com, 2 June 2025 See All Example Sentences for unnatural

Word History

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of unnatural was in the 14th century

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Cite this Entry

“Unnatural.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unnatural. Accessed 19 Jun. 2025.

Kids Definition

unnatural

adjective
un·​nat·​u·​ral ˌən-ˈnach-(ə-)rəl How to pronounce unnatural (audio)
ˈən-
1
: not following nature or a normal course of events
2
a
: not being in agreement with normal feelings or behavior
b
: lacking ease and naturalness
unnaturally
-ˈnach-(ə-)rə-lē How to pronounce unnatural (audio)
-ˈnach-ər-lē
adverb
unnaturalness noun

More from Merriam-Webster on unnatural

Last Updated: - Updated example sentences
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