Definition of SIGMA

sigma

Plural: sigmas, sigmata

Noun

  • The eighteenth letter of the Greek alphabet, represented by Σ or σ.
  • the 18th letter of the Greek alphabet
  • The eighteenth letter of the Classical and Modern Greek alphabets (Σ, σ), the twentieth letter of Old and Ancient.
  • The symbol Σ, used to indicate summation of a set or series.
  • The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.
  • A sigma male (a self-reliant and assertive male).

Examples

  • Finding SIGMA on your rack might not score big, but it can connect other crucial words.

Origin / Etymology

From Ancient Greek σῖγμα (sîgma), σίγμα (sígma), probably from the root sig- as seen in σίζω (sízō) (< sig-yo "to hiss") + -μα (-ma).

Scrabble Score: 8

sigma: valid Scrabble (US) TWL Word
sigma: valid Scrabble Word in Merriam-Webster MW Dictionary
sigma: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 10

sigma: valid Words With Friends Word