SI

See also: Appendix:Variations of "si"

Translingual

Symbol

SI

1. The ISO 3166-1 two-letter (alpha-2) code for Slovenia.
2. The abbreviation for Système International d'Unités or the International System of Units, commonly known as the metric system.

   see Appendix on SI Units

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English

Proper noun

SI

1. Initialism of Smithsonian Institution.

Noun

SI (uncountable)

1. (electronics) Initialism of signal integrity.
2. (technology) Initialism of systems integration.
3. Initialism of self-injury.
4. (fandom slang) Initialism of self-insertion. (of the author into fan fiction)
5. Initialism of supporting information.

Adjective

SI (not comparable)

1. (anatomy, medicine) Initialism of sacroiliac.

   SI joint

Anagrams

• 'is, I's, IS, Is, i's, is, is-

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French

Proper noun

SI

1. Abbreviation of Système international. (Système international d'unités) (the international standard metric system)

Alternative forms

• (Système International d'Unités): S.I., S. I.

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Japanese

Etymology

From English SI, from French SI.

Pronunciation

• (Tokyo) エスア​イ [èsúáꜜì] (Nakadaka – [3])
• IPA^(key): [e̞sɨᵝa̠i]

Noun

SI (katakana エスアイ, rōmaji esuai)

1. Synonym of 国際単位系 (Kokusai Tan'ikei, “International System of Units”); the SI

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Spanish

Proper noun

SI

1. Abbreviation of Sinaloa. (Mexican state)