terrain

Plural: terrains

Noun

• a piece of ground having specific characteristics or military potential
  • "they decided to attack across the rocky terrain"
• A single, distinctive rock formation; an area having a preponderance of a particular rock or group of rocks.
• An area of land or the particular features of it.
• The surface of the earth; the ground.
• pl. -S a tract of land

Examples

• "controlled flight into terrain"
• "The race will be run over a variety of terrain, including grass and sand."
• "This approach requires the aircraft to stay at an altitude of at least 3000 feet MSL until crossing the VOR in order to maintain terrain clearance."
• "TOO LOW, TERRAIN"

Synonyms

ground