Phrase guide

SI unit

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

Any unit of the International System of Units.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)

Definition source: Princeton WordNet 3.0

Examples

  • Today the United States is the only country in the world not totally committed to the Systeme International d'Unites

Meaning relationships

Synonyms: Systeme International d'Unites, Systeme International, SI system, SI, International System of Units, International System

Antonyms: none provided

Broader terms: metric system

History

Etymology

No etymology was provided for this word.

Across languages

Translations

3 source translations are retained for this English entry.

  • German: SI-Einheit — SI unit
  • Swedish: SI-enhet — SI unit
  • Turkish: SI birimi — SI unit