complexity

noun

com·​plex·​i·​ty kəm-ˈplek-sə-tē How to pronounce complexity (audio)
käm-
plural complexities
Synonyms of complexitynext
1
: something complex
the complexities of the murder trial
2
: the quality or state of being complex
the complexity of the contract

Examples of complexity in a Sentence

He was impressed by the complexity of the music. The diagram illustrates the complexity of the cell's structure. He doesn't grasp the complexity of the situation.
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.
However, your interest in gritty prestige crime dramas that expose the socioeconomic complexities and ethical ambiguities within the justice system? Talia Argondezzi, New Yorker, 3 Feb. 2026 The amendment process typically takes two to three months, although the complexity of a proposal can result in shorter or longer timelines for specific applications. Olivia Young, CBS News, 3 Feb. 2026 Adaptations that typically take weeks or months can be completed within minutes, reducing downtime and operational complexity. Jijo Malayil, Interesting Engineering, 3 Feb. 2026 Benedict Cumberbatch will undoubtedly bring the intelligence, depth, and moral complexity this role demands. Andreas Wiseman, Deadline, 3 Feb. 2026 See All Example Sentences for complexity

Word History

Etymology

complex entry 2 + -ity, perhaps after French complexité

First Known Use

1661, in the meaning defined at sense 1

Time Traveler
The first known use of complexity was in 1661

Browse Nearby Words

Cite this Entry

“Complexity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/complexity. Accessed 8 Feb. 2026.

Kids Definition

complexity

noun
com·​plex·​i·​ty kəm-ˈplek-sət-ē How to pronounce complexity (audio)
käm-
plural complexities
1
: something complex
the complexities of the English language
2
: the quality or state of being complex

More from Merriam-Webster on complexity

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