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English definition of “earnest”

earnest

adjective
 
 
/ˈɜːnɪst/
very serious and sincere: an earnest young man an earnest effortHonesty, openness and sincerityLacking humour
in earnest If something begins to happen in earnest, it really starts to happen in a serious way: The research will begin in earnest early next year.ImportanceUseful or advantageous
be in earnest to be very serious about something and mean what you are sayingHonesty, openness and sincerityLacking humour
earnestly adverb earnestness noun [U]
(Definition of earnest from the Cambridge Learners Dictionary © Cambridge University Press)
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