overoptimism

noun
over·​op·​ti·​mism | \ ˌō-vər-ə-ˈäp-tə-ˌmi-zəm How to pronounce overoptimism (audio) \

Definition of overoptimism

: an excessive or unrealistic degree of optimism … folks tend toward overoptimism about their prospects and their skills.— Bill Alpert

Other Words from overoptimism

overoptimistic \ ˌō-​vər-​ə-​ˌäp-​tə-​ˈmi-​stik How to pronounce overoptimistic (audio) \ adjective
overoptimistic projections for the future
overoptimistically \ ˌō-​vər-​ə-​ˌäp-​tə-​ˈmi-​sti-​k(ə-​)lē How to pronounce overoptimistically (audio) \ adverb
Wilma values her car at $10,000 and overoptimistically thinks she can sell it for $20,000, which is more than anyone will actually pay. — Sanford Ikeda

First Known Use of overoptimism

1898, in the meaning defined above

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The first known use of overoptimism was in 1898

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