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English definition of “earth”

earth

noun
 
/ɜːθ/
B1 (also the Earth) the planet that we live on
[no plural] soil or ground: a pile of earth
how, what, why, etc. on earth informal used when you are extremely surprised, confused, or angry about something: How on earth did this happen? Why on earth didn’t you tell me before?
(Definition of earth from the Cambridge Essential Dictionary © Cambridge University Press)
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