[f. THEATRIC a. + -ISM.] A mannerism or mode of action suited to the stage; artificial manner; = THEATRICALISM.

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1872.  Daily News, 12 April, 4/6. The superb theatricisms (if we may employ such a word) of the elder Pitt, and the sonorous solemnities of the younger.

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1880.  McCarthy, Own Times, IV. lxi. 357. The monstrous excesses, the preposterous theatricism of the Paris Commune.

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  So Theatricize v., trans. to make or render theatric or ‘stagy’; to make like stage scenery.

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1852.  Fraser’s Mag., XLV. 664. Theatricized Stolzenfels is a glaring example of the monstrosity which may be bred from restoration, with its pasteboard battlements and tawdry gothic ornaments.

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