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synchronicity

American  
[sing-kruh-nis-i-tee] / ˌsɪŋ krəˈnɪs ɪ ti /

noun

  1. (in the psychology of Carl Jung) the simultaneous occurrence of causally unrelated events and the belief that the simultaneity has meaning beyond mere coincidence.

  2. coincidence in time; contemporaneousness; simultaneity.

  3. Physics, Electricity. the state of having the same frequency and zero phase difference.

synchronicity British  
/ ˌsɪnkrəˈnɪsɪtɪ /

noun

  1. an apparently meaningful coincidence in time of two or more similar or identical events that are causally unrelated

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of synchronicity

First recorded in 1865–70 synchronicity for def. 1; 1950–55 synchronicity for def. 2; synchron(ous) ( def. ) + -ic ( def. ) + -ity ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

That synchronicity was too frequent to be coincidental.

From Science Daily • Oct. 22, 2025

On “Happy Gilmore 2,” Bowen said she saw Sandler and Herlihy working in even greater synchronicity, scouring every take and every joke to get it just right.

From Los Angeles Times • Jul. 25, 2025

They’re not working in synchronicity nor are they forming a singular tableau, but somehow these four performers create a moment of visual harmony, small and lovely, singularly breathtaking.

From Seattle Times • Feb. 2, 2024

And by the end of the tour, Jay-Z is standing in the crowd, watching with fatherly pride as his wife and daughter slay in synchronicity.

From BBC • Nov. 30, 2023

Based on the synchronicity and the force of the kicks, he was pretty sure they came from the twins.

From "The Vanderbeekers of 141st Street" by Karina Yan Glaser

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.