Definition.com
Gaiety is alone the hard cash of happiness... everything else is just a promissory note.
Definition.com
Gaiety is an effervescence of spirits produced by the expectation or the receipt of money.
Definition.com
Gaiety is to good-humor as animal perfumes to vegetable fragrance. The one overpowers weak spirits, the other recreates and revives them. Gaiety seldom fails to give some pain ; goodhumor boasts no faculties which every one does not believe in his own power, and pleases principally by not offending.
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