Antares

American  

[an-tair-eez, -tar-] / ænˈtɛər iz, -ˈtær- /

noun

Astronomy.

1. a red supergiant star of the first magnitude in the constellation Scorpius.

---

Antares British  

/ ænˈtɛəriːz /

noun

1. the brightest star in the constellation Scorpius. It is a variable binary star whose main component, a red supergiant, is associated with a fainter green component. Visual magnitude: 1.2 (red), 6.8 (green); spectral type: M1.5Ib (red); distance: 600 light years

---

Etymology

Origin of Antares

from Greek Antarēs, literally: simulating Mars (in colour), from _anti- + Arēs Mars

Example Sentences

Earlier this week, the Energy Department confirmed that a design from rival Antares Nuclear will be the first of several reactors to go critical by the July 4 deadline.

From Barron's • Jun. 11, 2026

Antares Capital and Ares Management formed a more than $1.7 billion continuation fund to recapitalize private-credit assets.

From The Wall Street Journal • Mar. 30, 2026

Let’s get back to my summertime favorites of Vega, Arcturus and Antares.

From Scientific American • Aug. 25, 2023

By 1993, Montserrat’s a tart-tongued sound editor seven years into a freelancing stint at Antares, a second-tier studio.

From Los Angeles Times • Jul. 17, 2023

But now, to his astonishment, instead of glooming pale as a little moon, it burned angry as Antares.

From The Three Mulla-mulgars by De la Mare, Walter