SI

Definition : Système International d‘unités French International System of Units
Category : Academic & Science » Units
Country/Region : Worldwide Worldwide
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What does SI mean?

International System of Units (French: Système International d’unités, SI) is the international standard for measurement. SI is a system of measurement based on 7 base units:
metre (length)
kilogram(mass)
second (time)
ampere (electric current)
kelvin (temperature),
mole (amount of substance)
candela (luminous intensity)

The system also defines a set of prefixes to the unit names and unit symbols that may be used when specifying multiples and fractions of the units and specifies names for 22 derived units.

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Slovenia SI Slovenia
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Worldwide Si Silicon
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India SI Sub-Inspector
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United States SI Sports Illustrated
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Worldwide SI Shift In
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Worldwide SI Sacroiliac
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Worldwide SI Swarm Intelligence
Computing
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Sri Lanka si Sinhalese
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United Kingdom SI Statutory Instrument
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Slovenia si Slovenia (TLD)
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Worldwide SI Signal Integrity
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Worldwide SI Small Intestine
Medical
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Worldwide SI System Integrator
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General Computing
Worldwide SI Spark-Ignition
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Worldwide SI Simple Interest
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Worldwide SI Supplemental Instruction
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United States SI Smithsonian Institution
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United Kingdom SI Sports Interactive
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United States SI St. Ignatius College Preparatory
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Universities & Institutions
Philippines SI Silay Institute
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Universities & Institutions
India SI Survey of India
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Worldwide SI Socialist International
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Politics
United Kingdom SI Survival International
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Medical Organizations
Italy SI Province of Siena
Transport & Travel
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License Plates
Worldwide SI Substantia Innominata
Medical
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Anatomy & Physiology
Worldwide SI Suicidal Ideation
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Diseases & Conditions
Worldwide SI Stroke Index
Sports & Games
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Other Games
Argentina SI Solidaridad e Igualdad
[Solidarity and Equality]
Governmental
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Politics
Worldwide SI Societas Iesu
[Society of Jesus]
Society & Culture
>>
Religion & Spirituality
Switzerland SI Schweizer Informatik Gesellschaft
[Swiss Informatics Society]
Associations & Organizations
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Professional Associations
Sweden SI Svenska Institutet
[Swedish Institute]
Governmental
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Departments & Agencies
Spain SI Solidaritat Catalana per la Independència
[Catalan Solidarity for Independence]
Governmental
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Politics
Singapore SI Station Inspector
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Police
Ireland SI Skynet Airlines
Transport & Travel
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Airline Codes
Philippines SI Samahang Ilokano
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United States SI Spokane International Railroad
Transport & Travel
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Rail Transport

Frequently Asked Questions

What is the full form of SI?

The full form of SI is Système International d‘unités

What are the full forms of SI in Academic & Science?

Système International d‘unités | Silicon | Signal Integrity | Supplemental Instruction | St. Ignatius College Preparatory | Silay Institute

What are the full forms of SI in Worldwide?

Système International d‘unités | Silicon | Shift In | Sacroiliac | Swarm Intelligence | Signal Integrity | Small Intestine | System Integrator | Spark-Ignition | Simple Interest | Supplemental Instruction | Socialist International | Substantia Innominata | Suicidal Ideation | Stroke Index | Societas Iesu

Translation

Translate Système International d‘unités into other languages

Citations Formatting rules vary by edition. Please verify against your required style manual.

Chicago Style

FullForms. "SI." Accessed April 1, 2026. https://fullforms.com/SI.

Harvard Style

FullForms (2026) 'SI', FullForms.com. Available at: https://fullforms.com/SI (Accessed: 01 April 2026).

MLA Style

"SI." FullForms.com, 2026, https://fullforms.com/SI. Accessed 01 Apr. 2026.

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