1
- a large bowl-shaped cavity in the ground or a planet, typically one caused by an explosion or the impact of a meteorite or other celestial body（常指爆炸形成的或陨星及其他天体撞击而成的）坑（如陨石坑、弹坑等）。
1.1
- a large pit or hollow forming the mouth of a volcano火山口。
1.2
- a cavity or hole in any surface穴, 洞。
2
- a large bowl used in ancient Greece for mixing wine（古希腊用的）调酒碗。
with obj.
- form a crater in (the ground or a planet)在（地面或行星）上形成坑：
pilots returned to the airfields to crater the runways
飞行员们返回了机场, 将跑道弄得坑坑洼洼
as adj. cratered the heavily cratered areas of the moon月球上到处是坑的地方。
词源
early 17th cent. (denoting the hollow forming the mouth of a volcano)：via Latin from Greek kraēr 'mixingbowl', from krasis 'mixture'.