Meaning of “earnest” - Learner’s Dictionary


adjective uk us /ˈɜːnɪst/

very serious and sincere:

an earnest young man
an earnest effort
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.
be in earnest

to be very serious about something and mean what you are saying

earnestly adverb
earnestness noun [ U ]

(Definition of “earnest” from the Cambridge Learner’s Dictionary © Cambridge University Press)