sigma — meaning in English

English meaning

• sigma noun The eighteenth letter of the Greek alphabet (Σ, σ).

Senses

sigma is used for these senses in English:

• sigma The eighteenth letter of the Classical and Modern Greek alphabets (Σ, σ), the twentieth letter of Old and Ancient.

sigma — full definition

1. noun The eighteenth letter of the Greek alphabet (Σ, σ).
2. noun In statistics, the symbol used to represent standard deviation from a mean.
3. noun Slang for a self-reliant, emotionally detached man who operates outside conventional social hierarchies (a "sigma male").