The meaning of SIGMA is the 18th letter of the Greek alphabet. How to use sigma in a sentence.

In number theory, σ is included in various divisor functions, especially the sigma function or sum-of-divisors function. In applied mathematics, σ (T) denotes the spectrum of a linear map T.

"Slay" as a slang term means to greatly impress or amuse, and "sigma" means popular or successful. If you’re lurking in dark corners of the internet, there’s alpha, beta and sigma males.

SIGMA definition: 1. the 18th letter of the Greek alphabet 2. the 18th letter of the Greek alphabet. Learn more.

sigma in American English (ˈsɪɡmə ) noun Origin: Gr the eighteenth letter of the Greek alphabet (Σ, σ, ς)

Definition of sigma noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. The 18th letter of the Greek alphabet. See Table at alphabet. 2. A sigma factor. 3. Statistics The standard deviation of a given probability distribution or a given set of data.

Feb 3, 2026 · Adjective sigma (comparative more sigma, superlative most sigma) (Internet slang) Possessing characteristics of a sigma male.

Dec 16, 2025 · Sigma is an Internet slang term, especially among young men, referring to a man whose self-assured, dogged individualism is considered a model of status, success, and attractiveness. It …

Sigma definition: The 18th letter of the Greek alphabet.