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Main meanings of SI in English

: si1Si2SI3SI4

SI1

Pronunciation /ˌɛsˈʌɪ/

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abbreviation

  • The international system of units of measurement.

Origin

From French Système International.

Main meanings of SI in English

: si1Si2SI3SI4

SI2

Pronunciation /ˌɛsˈʌɪ/

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abbreviation

Law

  • Statutory instrument.

Main meanings of si in English

: si1Si2SI3SI4

si3

Pronunciation /siː/

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noun

Music
another term for ti

Origin

Early 18th century from the initial letters of Sancte Iohannes, the closing words of a Latin hymn (see solmization).

Main meanings of Si in English

: si1Si2SI3SI4

Si4

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  • The chemical element silicon.