/ ˈɒptɪmɪzəm; NAmE ˈɑːp-/ noun
[ U ] optimism (about / for sth) a feeling that good things will happen and that sth will be successful; the tendency to have this feeling :
optimism about / for the future
We may now look forward with optimism .
a mood of cautious optimism
There are very real grounds for optimism.
OPP pessimism
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WORD ORIGIN
mid 18th cent.: from French optimisme , from Latin optimum best thing, neuter (used as a noun) of optimus best.