S.I.

proper noun

Synonym of SI (International System of Units)

“Civil Procedure Rules 1998, S.I. 1998/3132 (L. 17)”

Similar
SI
OriginFrench S.I. →
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

proper noun

alternative SI · alternative S. I.

  1. Synonym of SI (International System of Units)

    Synonyms: SI

noun

alternative SI · alternative S. I.

  1. AustraliaCanadaUKabbreviationinitialismlawInitialism of statutory instrument.

    Civil Procedure Rules 1998, S.I. 1998/3132 (L. 17)

Synonyms & antonyms

proper nounSynonym of SI (International System of Units)

Similar
SI

Origin

  1. FrenchS.I.
  2. EnglishS.I.

From French S.I..

More words from French

Full word history & related roots →
Cite this entry
APA

S.I.. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/S.I.

MLA

“S.I..” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/S.I.. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “S.I.,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/S.I..

Source: S.I. on Wiktionary, CC BY-SA 4.0.