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
"As I looked out my window, I saw a bright meteor streak across the night sky."
An atmospheric or meteorological phenomenon. These were sometimes classified as aerial or airy meteors (winds), aqueous or watery meteors (hydrometeors: clouds, rain, snow, hail, dew, frost), luminous meteors (rainbows and aurora), and igneous or fiery meteors (lightning and shooting stars).
"The ancient text classified the sudden flash of lightning as an igneous meteor while grouping the morning fog under aqueous meteors."
To move at great speed.
"The meteor zoomed past our heads, blurring into a streak of light before vanishing in seconds."