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 : marked by the view that all is for the best in this best of possible worlds : excessively optimistic  |  | 
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 : any of a genus (Forsythia)  of ornamental shrubs of the olive family with opposite leaves and  yellow bell-shaped flowers appearing before the leaves in early spring  |  | 
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 : a discourse or declamation full of bitter condemnation : tirade  |  | 
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 : any of a genus (Dahlia)  of American tuberous-rooted composite herbs having opposite pinnate  leaves and rayed flower heads and including many that are cultivated as  ornamentals  |  | 
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2  a : empty boasting    b : arrogant pretension : cockiness  |  | 
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