plural -s
: a theory that chance is an objective reality
especially : a theory in evolution that variation may be purely fortuitous
contrasted with uniformitarianism
: a proposition that absolute chance is operative in the cosmos

Word History


Greek tychē chance, fortune + English -ism; akin to Greek tychanein to happen, happen on, attain, teuchein to make, build

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Dictionary Entries Near tychism

Cite this Entry

“Tychism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tychism. Accessed 18 May. 2024.

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