<p><strong>Noun</strong></p><ul><li>Astronomy. a meteoroid that has entered the earth's atmosphere.</li><li>a transient fiery streak in the sky produced by a meteoroid passing through the earth's atmosphere; a shooting star or bolide.</li><li>any person or object that moves, progresses, becomes famous, etc., with spectacular speed.</li><li>(formerly) any atmospheric phenomenon, as hail or a typhoon.</li><li>Meteor, Military. Britain's first operational jet fighter, a twin-engine aircraft that entered service in 1944.</li></ul>