Earth-grazing /ˈɜːθɡɹeɪzɪŋ/ adjective2 •Of a meteoroid, entering the Earth's atmosphere and leaving into space again. •Approaching the Earth closely.The closest previous sighting of an Earth-grazing asteroid was in March of 1989. It was 330 feet in diameter and passed at 10 times the distance to the moon. — 1991