optimism
/ˈɑptɪmɪzəm/ noun B2- A tendency to expect the best, or at least, a favourable outcome. · I love her youth, her beauty and above all her optimism that everything will turn out fine.
- The doctrine that this world is the best of all possible worlds.
- The belief that good will eventually triumph over evil.
Plural optimisms
From the library
But Anne, with her elbows on the window sill, her soft cheek laid against her clasped hands, and her eyes filled with visions, looked out unheedingly across city roof and spire to that glorious dome of sunset sky and wove her dreams of a possible future from the golden tissue of youth’s own optimism.
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