English

Definition of countless adjective from the Oxford Advanced Learner's Dictionary

 

countless

 adjective
adjective
BrE BrE//ˈkaʊntləs//
 
; NAmE NAmE//ˈkaʊntləs//
 
[usually before noun]
 
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very many; too many to be counted or mentioned I've warned her countless times. The new treatment could save Emma's life and the lives of countless others. compare uncountable
See the Oxford Advanced American Dictionary entry: countless