Sirius

noun

Sir·​i·​us ˈsir-ē-əs 

: a star of the constellation Canis Major that is the brightest star in the heavens

called also Dog Star

Word History

Etymology

Middle English, from Latin, from Greek Seirios

First Known Use

14th century, in the meaning defined above

Kids Definition

Sirius

noun

Sir·​i·​us ˈsir-ē-əs 

: the brightest star in the night sky

called also Dog Star

Etymology

Middle English Sirius "the brightest star," from Latin Sirius (same meaning), from Greek Seirios "the brightest star," literally, "burning, scorching" see Word History at dog days