Sekirov Dictionary

sigma

/ˈsɪɡmə/

noun4

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

adjective1

  1. (Internet) Possessing characteristics of a sigma male.
forms

sigmas · sigmata · more sigma · most sigma

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