A meteor is a space rock that hits the atmosphere of the Earth. It's also another word for a shooting star.

There are a lot of bodies in space, such as suns, planets, and moons. Those are all rather large, but there are smaller bodies too, such as meteors. A meteor is a smaller body in space that collides with the Earth or another planet. You can also use this word for the light caused by such an impact: a meteor is a shooting star. Many meteors are caused by comets that have decayed.

Definitions of meteor
  1. noun
    (astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
    synonyms: meteoroid
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    stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
    meteor swarm
    a group of meteoroids with similar paths
    a stony meteorite consisting of silicate minerals
    micrometeor, micrometeorite, micrometeoroid
    a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere
    a meteorite composed principally of olivine and metallic iron
    a meteorite consisting principally of nickel and iron
    type of:
    estraterrestrial body, extraterrestrial object
    a natural object existing outside the earth and outside the earth's atmosphere
  2. noun
    a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explode
    synonyms: shooting star
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    bolide, fireball
    an especially luminous meteor (sometimes exploding)
    type of:
    light, visible light, visible radiation
    (physics) electromagnetic radiation that can produce a visual sensation
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