Orion noun. [ǝ'rʌɪǝn] LME.
[Latin from Greek Oriōn mighty hunter in Greek mythol., (also the constellation).]
(The name of) a conspicuous constellation lying on the celestial equator, at the edge of the Milky Way, and interpreted as a hunter with belt and sword.
Orion's belt a short line of three bright stars across the middle of Orion. Orion's hound Sirius, the dog-star.

■ Orionid noun & adjective (designating) any of a shower of meteors seeming to radiate from the constellation Orion, in October L19.

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