Search Dictionary
Definition of si

si

/siː/
si
Plural:sis
JUMP TO:

si Lexical Profile

si Game Scores & Validity

• noun

1

A syllable used in solfège to represent the seventh degree of a diatonic major scale, or the pitch B in fixed-do systems.

Example

"In European conservatories using fixed-do solfège, students sing the syllable si whenever the note B appears in the score."

Synonyms
View all synonyms for si

Word Nuance & Usage

In modern English solfège, 'ti' has largely replaced 'si' for the seventh degree of the scale so that each syllable begins with a distinct consonant.

• Rhymes for si

• Nearby Words

shyly
shyness
shyster
si
sialosyrinx
siam
siamang

Word Origin & Etymology

Borrowed from French and Italian 'si', traditionally formed as an acronym from the initial letters of 'Sancte Ioannes' (Saint John), the final line of a medieval Latin hymn to John the Baptist used by Guido d'Arezzo to name the musical notes.

Cite this Entry

Wordmom. (2026). Definition of Si. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/si
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.