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English definition of “optimism”

optimism

noun [U]
 
 
/ˈɒptɪmɪzəm/
the belief that good things will happen: a mood/spirit of optimism There is cause/reason for optimism. He expressed cautious optimism about the future. → Opposite pessimismHoping and hopefulnessPotential
(Definition of optimism from the Cambridge Learners Dictionary © Cambridge University Press)
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