American English

Definition of underdeveloped adjective from the Oxford Advanced American Dictionary

 

underdeveloped

 adjective
adjective
NAmE//ˌʌndərdɪˈvɛləpt//
 
 
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(of a country, society, etc.) having few industries and a low standard of living “A developing country” is now the usual expression. compare developed, developing, undeveloped
underdevelopment
 
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NAmE//ˌʌndərdɪˈvɛləpmənt//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: underdeveloped