Standard Lemma guide
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
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
adj
Initialism of sacroiliac.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, initialism, not-comparable
Topics: anatomy, medicine, sciences
Synonyms: none provided
Antonyms: none provided
name
International System of Units
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
Initialism of Smithsonian Institution.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, initialism
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
Initialism of Sports Illustrated.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, initialism
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
A diminutive of the male given name Simon.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
A diminutive of the female given name Simone.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
A diminutive of the male given name Silas.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
A river in Shandong, China.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
A county of Suzhou, Anhui, China.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
Various prefectures of imperial China.
Definition source: English Wiktionary via Wiktextract
Usage: historical
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
A surname from Mandarin.
Definition source: English Wiktionary via Wiktextract
Usage: historical
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
name
Alternative form of Xi.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of, alternative
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of signal integrity.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
Topics: business, electrical-engineering, electricity, electromagnetism, electronics, energy, engineering, natural-sciences, physical-sciences, physics
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of systems integration.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
Topics: engineering, natural-sciences, physical-sciences, technology
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of self-injury.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of suicidal ideation.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of self-insertion (of the author into fan fiction).
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, slang, uncountable
Topics: lifestyle
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of spark ignition.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
Topics: engineering, mechanical, mechanical-engineering, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of supporting information.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of special intelligence.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of systematic internaliser.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
Topics: business, finance
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of swarm intelligence.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of synthetic intelligence.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of sales invoice.
Definition source: English Wiktionary via Wiktextract
Usage: Philippines, abbreviation, alt-of, countable, initialism, uncountable
Topics: accounting, business, finance
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of statutory instrument.
Definition source: English Wiktionary via Wiktextract
Usage: Australia, Canada, UK, abbreviation, alt-of, countable, initialism, uncountable
Topics: law
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Initialism of subinspector (of police, etc).
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
Synonyms: none provided
Antonyms: none provided
noun
Initialism of surface interval.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, countable, initialism, uncountable
Topics: diving, hobbies, lifestyle, sports, underwater-diving
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
A syllable used in solfège to represent the seventh note of a major scale.
Definition source: English Wiktionary via Wiktextract
Topics: entertainment, lifestyle, music
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
the syllable naming the seventh (subtonic) note of any musical scale in solmization
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: ti, te
Antonyms: none provided
Broader terms: solfa syllable
noun
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
Synonyms: Systeme International d'Unites, Systeme International, SI system, SI unit, International System of Units, International System
Antonyms: none provided
Broader terms: metric system
noun
a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: silicon, atomic number 14
Antonyms: none provided
Broader terms: chemical element, element, semiconductor, semiconducting material
History
Borrowed from French SI (“Système international d'unités”).
From clipping of various words beginning with the syllable /saɪ/.
From the Hanyu Pinyin romanizations of the Mandarin pronunciations of Chinese 泗 (Sì), 肆 (Sì), and 姒 (Sì, “a surname, older brother's wife”).
From Middle English si (“seventh degree or note of Guido of Arezzo's hexachordal scales”), Italian si in the solmization of Guido of Arezzo, from the initials of Latin Sāncte Iohannēs (“Saint John (the Baptist)”) in the lyrics of the scale-ascending hymn Ut queant laxis by Paulus Deacon; thus, also an initialism of Sāncte Iohannēs.
Across languages
17 source translations are retained for this English entry.
