Sirius

American  

[sir-ee-uhs] / ˈsɪr i əs /

noun

1. Astronomy. the Dog Star, the brightest-appearing star in the heavens, located in the constellation Canis Major.

2. Classical Mythology. Also Sirius

   1. the dog of Orion.

   2. Icarius' faithful dog, who was changed into a star.

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Sirius British  

/ ˈsɪrɪəs /

noun

1. Also called: the Dog Star.   Canicula.   Sothis.  the brightest star in the sky after the sun, lying in the constellation Canis Major. It is a binary star whose companion, Sirius B , is a very faint white dwarf. Distance: 8.6 light years

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Sirius Scientific  

/ sĭr′ē-əs /

1. The brightest star seen in the night sky. It is in the constellation Canis Major. It is a white main-sequence star on the Hertzsprung-Russell diagram, with an apparent magnitude of −1.5. Sirius is a binary star, and its companion is a white dwarf star referred to as the Pup. Sirius is also known as the Dog Star. Scientific name: Alpha Canis.

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Etymology

Origin of Sirius

1325–75; Middle English < Latin Sīrius < Greek Seírios

Example Sentences

See Examples For:

Sirius

Berkshire Hathaway’s insurers hold the equity of many companies Berkshire owns or holds a large stake in, including Duracell, Occidental Petroleum and Sirius XM.

From The Wall Street Journal ● May 26, 2026

Around 80 to 100 people apply to join the Sirius patrol each year, with the only prerequisite being completion of Denmark's basic military training.

From Barron's ● Jan. 28, 2026

It came loaded with a subscription to the Sirius radio service, featuring a channel devoted entirely to Bruce called E Street Radio.

From The Wall Street Journal ● Oct. 24, 2025

Ms Crickmore called her winning vegetable Sirius, "because that's the brightest star in the sky".

From BBC ● Oct. 15, 2025

“My mum told Sirius that Dumbledore borrowed the Cloak! This is why! He wanted to examine it, because he thought it was the third Hallow! Ignotus Peverell is buried in Godric’s Hollow....”

From "Harry Potter and the Deathly Hallows" by J.K. Rowling