Welcome to the new LearnersDictionary.com. We want to hear your thoughts about the new design.

sigma

1 ENTRIES FOUND:
Save
sigma/ˈsɪgmə/noun
pluralsigmas
sigma
/ˈsɪgmə/
noun
pluralsigmas
Learner's definition of SIGMA  
[count]
: the 18th letter of the Greek alphabet — Σ or σ or ς
Comments & Questions  
Comments & Questions
What made you want to look up sigma? Include any comments and questions you have about this word.