si

¹

[ see ]

noun

, Music.

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

Si

²

Symbol, Chemistry.

1. silicon.

SI

³

abbreviation for

1. International System of Units.

S.I.

⁴

abbreviation for

1. Sandwich Islands.
2. Staten Island.

SI

¹

symbol for

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

abbreviation for

1. South Island

si

²

the internet domain name for

1. Slovenia

si

³

/ siː /

noun

1. music a variant of te

Si

⁴

/ ʃiː /

noun

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

Si

⁵

the chemical symbol for

1. silicon

Word History and Origins

Origin of si¹

First recorded in 1720–30; gamut

Example Sentences

Being denied the access I needed to report, I wasn’t much use to SI.

From Los Angeles Times

My elbow barks every time I bicep curl; my SI joint is creaky from sitting all day, which makes my glutes and lower back tight.

From Los Angeles Times

On an episode of the “SI Media with Jimmy Traina” podcast a week later, Barkley expressed similar frustrations about being left in the dark about the future of his show.

From Los Angeles Times

The proud grandmother revealed that she told magazine staffers she did not want retouching done on her SI Swimsuit photos — even dishing that she had a cheeseburger the day before her shoot.

From Seattle Times

In one instance, the lawsuit said, Arena Group published a news release for 5-Hour Energy that was labeled a Sports Illustrated editorial piece, which undermined “the value and reputation of the SI brand and business.”

From New York Times