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

 

pessimistic

 adjective
adjective
BrE BrE//ˌpesɪˈmɪstɪk//
 
; NAmE NAmE//ˌpesɪˈmɪstɪk//
 
 
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pessimistic (about something) expecting bad things to happen or something not to be successful; showing this They appeared surprisingly pessimistic about their chances of winning. a pessimistic view of life I think you're being far too pessimistic. opposite optimisticExtra examples I am deeply pessimistic about the future. These figures look quite pessimistic. He seems to take a rather pessimistic view of human nature. I think you’re being far too pessimistic.
See the Oxford Advanced American Dictionary entry: pessimistic