crater A bowl-shaped pit on ground (planetary surface). It is usually caused either by a meteorite impact, powerful explosion, or by geological activity on the planet. On Earth, craters are generally the results of volcanic eruption. See alsomushroom cloudwastelandvalleyExternal linksWikipedia: Crater Aliases: noneRevision 7 by Anonymous at 2025-04-20 22:40:41.878855