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The Collaborative International Dictionary
Hyperbolism

Hyperbolism \Hy*per"bo*lism\, n. [Cf. F. hyperbolisme.] The use of hyperbole.
--Jefferson.

Wiktionary
hyperbolism

n. 1 (context uncountable English) The use of hyperbole 2 (context countable English) An instance of hyperbole 3 (context countable geometry English) A blow-up of a curve at a point.