Definition of pessimist noun from the Oxford Advanced Learner's Dictionary

 

pessimist

 noun
noun
BrE BrE//ˈpesɪmɪst//
 
; NAmE NAmE//ˈpesɪmɪst//
 
 
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a person who always expects bad things to happen You don't have to be a pessimist to realize that we're in trouble. opposite optimist
See the Oxford Advanced American Dictionary entry: pessimist