Si Definition & Meaning

American

British

Etymology

Examples

si 1 American [see] / si /

noun

Music.

1. the syllable used for the seventh tone of a scale and sometimes for the tone B.

Si 2 American Symbol, Chemistry.

1. silicon.

SI 3 American

abbreviation

1. International System of Units.

S.I. 4 American

abbreviation

1. Sandwich Islands.

2. Staten Island.

SI 1 British

symbol

1. Système International (d'Unités) See SI unit

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

abbreviation

1. South Island

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Si 2 British / ʃiː /

noun

1. a variant transliteration of the Chinese name for the Xi

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Si 3 British

symbol

1. silicon

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 si 4 British / siː /

noun

1. music a variant of te

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 si 5 British

abbreviation

1. Slovenia

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of si

First recorded in 1720–30; gamut

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

She claims she even uses words and mannerisms such as "mamma mia", "bambino" and "si" in conversation without realising it.

From BBC

Shaw, who trained with the national team last month, also si looking for her first senior cap.

From Los Angeles Times

“We used to call her ‘si tau por’ when we were under her rule.

From Seattle Times

In the city, the Queen was affectionately called si tau por, which means "boss lady" in Cantonese.

From BBC

"At my age, my body type, as an unsigned model, with 2 children, this magical moment would have never happened without @si_swimsuit," Gaffney shared.

From Fox News

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.