The stony matter fall under the gravity of the earth towards the earth's atmosphere where they completely burn due to air friction are called meteors.
The remains of some big meteors, that do not finish in the atmosphere by burning, reaches on the earth surface are called meteorites.
A meteor is the flash of light that is seen in the night sky when small debris burns in the space while passing through our atmosphere and it is also well known as a shooting star. The meteors are formed from meteoroids.
If any part of a meteoroid survives the fall through our atmosphere and it lands on the surface of earth, that is when it is called meteorite.