Definition of earthling noun from the Oxford Advanced Learner's Dictionary

 

earthling

 noun
noun
BrE BrE//ˈɜːθlɪŋ//
 
; NAmE NAmE//ˈɜːrθlɪŋ//
 
 
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(in science fiction stories) a word used by creatures from other planets to refer to a person living on the earth
See the Oxford Advanced American Dictionary entry: earthling