complexity

noun

com·​plex·​i·​ty kəm-ˈplek-sə-tē How to pronounce complexity (audio)
käm-
plural complexities
Synonyms of complexity
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.
The World Cup offers us a fascinating glimpse at the complexities of national pride and identity. Aj Willingham, AJC.com, 6 July 2026 Depending on the complexity of the case, fees generally start at $2,500 and can go to $5,000 or more. Nick Perry, USA Today, 6 July 2026 The musical’s overture gives you a sense of the complexity that’s needed to make seeming simple and straightforward material really soar. Christopher Arnott, Hartford Courant, 6 July 2026 According to the researchers, future electronic-photonic systems will likely require multiple coupling technologies, each balancing manufacturing complexity, optical efficiency, and integration density differently. Kaif Shaikh, Interesting Engineering, 6 July 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 7 Jul. 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

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