Definitions for sigma
ˈsɪg məsig·ma

Princeton's WordNetRate this definition:3.3 / 3 votes

1. sigmanoun

   the 18th letter of the Greek alphabet

WiktionaryRate this definition:4.0 / 2 votes

1. sigmanoun

   The name for the eighteenth letter of the Classical and Modern Greek, the nineteenth letter of Old and Ancient.

2. sigmanoun

   The symbol u03A3, used to indicate summation of a set or series.

3. sigmanoun

   The symbol u03C3, used to indicate one standard deviation from the mean, particularly in a normal distribution.

WikipediaRate this definition:0.0 / 0 votes

1. Sigma

   Sigma (; uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200. In general mathematics, uppercase Σ is used as an operator for summation. When used at the end of a letter-case word (one that does not use all caps), the final form (ς) is used. In Ὀδυσσεύς (Odysseus), for example, the two lowercase sigmas (σ) in the center of the name are distinct from the word-final sigma (ς) at the end. The Latin letter S derives from sigma while the Cyrillic letter Es derives from a lunate form of this letter.

ChatGPTRate this definition:0.0 / 0 votes

1. sigma

   Sigma (σ) is a mathematical symbol used to represent various concepts in different academic fields. 1) In mathematics and statistics, it is commonly used to represent the standard deviation of a set of numbers. 2) In calculus, sigma represents the summation notation indicating that a series of numbers needs to be added together. 3) In physics, it could represent electrical conductivity, while in economics, it could stand for elasticity. 4) Sigma is also a letter in the Greek alphabet. Always, the meaning of Sigma depends on the context in which it is used.

Webster DictionaryRate this definition:2.0 / 1 vote

1. Sigmanoun

   the Greek letter /, /, or / (English S, or s). It originally had the form of the English C

2. Etymology: [L., from Gr. , .]

WikidataRate this definition:0.0 / 0 votes

1. Sigma

   Sigma is the eighteenth letter of the Greek alphabet, and carries the 'S' sound. In the system of Greek numerals it has a value of 200. When used at the end of a word, and the word is not all upper case, the final form is used, e.g. Ὀδυσσεύς – note the two sigmas in the center of the name, and the word-final sigma at the end.

Chambers 20th Century DictionaryRate this definition:3.0 / 1 vote

1. Sigma

   sig′ma, n. the Greek letter corresponding to our s—written Σ (capital), σ (small initial) or ς (small final).—adjs. Sig′mate, Sigmat′ic.—ns. Sigmā′tion, the adding of s at the end of a word or syllable; Sig′matism, repetition of s or the s-sound: defective pronunciation of this sound.—adjs. Sig′moid, -al, formed like s.

Suggested ResourcesRate this definition:3.0 / 1 vote

1. sigma

   The sigma symbol -- In this Symbols.com article you will learn about the meaning of the sigma symbol and its characteristic.

2. sigma

   Song lyrics by sigma -- Explore a large variety of song lyrics performed by sigma on the Lyrics.com website.

Matched Categories

1. • Letter

Usage in printed sourcesFrom: 

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How to pronounce sigma?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say sigma in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of sigma in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of sigma in Pythagorean Numerology is: 4

Examples of sigma in a Sentence

1. Eric Rivera:

   We appreciate the willingness of the national office of Delta Sigma Phi to step in and address these issues and take action with us. We hope that through these actions, when the time is right, they will bring a chapter back to SDSU and be productive members of our community.

2. The Sigma Alpha Mu board:

   Sigma Alpha Mu's values and standards of conduct were violated by the actions of those members whose behavior was abhorrent.

3. Eric Rivera:

   There is no place in our campus community for the type of ongoing behaviors displayed by those involved with this fraternity chapter, we appreciate the willingness of the national office of Delta Sigma Phi to step in and address these issues and take action with us. We hope that through these actions, when the time is right, they will bring a chapter back to SDSU and be productive members of our community.

4. Ryan McNutt:

   Allowing drivers to occasionally work more hours will reduce the number of trucks and drivers it takes to move the same amount of fuel, right now SIGMA believes the actions the federal government has taken to be sufficient.

5. The Trinidad-born rapper:

   These fraternities are places that us as hip-hop artists, we come and do amazing shows for these fraternities, like I just did Texas Tech, I just did Texas AM, Delta Chi, Sigma Chi, and those guys were great. And I've done a show actually at Oklahoma last year, so to see that that chapter feels that type of way toward the black race, it hurts, man. It sucks.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=sigma
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Sigma
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Sigma
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/sigma
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=sigma
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=sigma
8. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=sigma