Definition of epsilon
1 : the 5th letter of the Greek alphabet — see alphabet table
2 : an arbitrarily small positive quantity in mathematical analysis
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Recent Examples of epsilon from the Web
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Based on the Greek letter epsilon, the euro symbol represents the coming together of nations.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'epsilon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of epsilon
Greek e psilon, literally, simple e
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See words that rhyme with epsilon Britannica.com: Encyclopedia article about epsilon
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