v. [f. EXTERIOR + -IZE.] trans. To make exterior; to realize (a conception) in outward form; to attribute an external existence to (states of consciousness).

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1879.  Maudsley, Pathol. Mind, 449. It is the unfailing tendency of the mind to project its affections outwards and to transfer them to objects as qualities—to exteriorise its states as qualities.

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1890.  T. Child, in Harper’s Mag., May, 821/1. His painting is a means of exteriorizing his conceptions.

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