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1. The 20th Old/Ancient Greek letter or the 18th Modern/Classical Greek letter.
2. In mathematics used to indicate the summation of a set or series.
3. In statistics used to indicate something complicated not able to be understood by Urban Dictionary readers.
4. The best meaning: a sigma male. Similar to an alpha male but better. A lone wolf - a self-reliant and assertive male.
1. Yesterday I read a book in Greek and I saw the letter Sigma.
2. Blah blah blah sigma blah blah series blah blah- hey, you, why aren't you listening in class!
3. Mommy, what does sigma in statistics mean?
4. Man, look at this guy, he's such a sigma!
Sigma by Skalz_ July 14, 2024
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uhhh its referring to a supposed classification for men who are successful and popular,,, BUTTTT also silent and rebellious!
I feel so sigma right now!
Sigma by Hedroix July 16, 2024
What every toddler on YouTube shorts says they are in the comment section
Person:1 I’m a sigma

Person:2 shut tf upšŸ’€
Sigma by Macer101 July 20, 2024
It's me.
"I'm sigma"
Sigma is a word used by degenerates who believe they are "superior" to other people because they hate women and.. I don't know breathe differently to try and get a better jaw line? They mistreat women as they have mommy issues. They also meat-ride Patrick Bateman making constant edits out of him instead of getting a job
"even though my mommy left when I was 6, I'm such a sigma male!"

"Tyler, you are a sigma.. In a bad way"
Sigma by SomebodyCool19 July 22, 2024
The worst type of meme to exist. Literal brainrot and cringey-ness.. If you like this you have to be fucking 5 or 3.
Man #1: Erm, what the sigma?
Man #2: Stay 200 miles away from me.
Sigma by Ahmed3737 July 24, 2024
Some clueless teenager who clearly watches too much Tik Tok, because they're unaware of what a real sigma is.
Joe: 'I'm a Sigma, I'm above all of you. All the alphas and betas bow down to me'.
Bob: 'Do you even know what a real Sigma is?'
Sigma by abc chicken July 28, 2024