epsilon
noun
ep·si·lon
ˈep-sə-ˌlän 
-lən
plural epsilons
1
: the 5th letter of the Greek alphabet see Alphabet Table
2
: something or someone designated with the name epsilon or the Greek letter ε especially denoting the fifth in position, order, or class
3
: an arbitrarily small positive quantity in mathematical analysis
Cite this Entry
“Epsilon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epsilon. Accessed 3 Nov. 2025.
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epsilon
noun
ep·si·lon
ˈep-sə-ˌlän
-lən
: the 5th letter of the Greek alphabet
—Ε or ε
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