Etymology
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sublimation (n.)

late 14c., in alchemy, "process of purifying by vaporizing then allowing to cool," from Medieval Latin sublimationem (nominative sublimatio) "refinement," literally "a lifting up, deliverance," noun of action from past participle stem of Latin sublimare "to raise, elevate," from sublimis "lofty, high, exalted; eminent, distinguished" (see sublime).

updated on December 19, 2013

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Definitions of sublimation from WordNet

sublimation (n.)
(chemistry) a change directly from the solid to the gaseous state without becoming liquid;
sublimation (n.)
(psychology) modifying the natural expression of an impulse or instinct (especially a sexual one) to one that is socially acceptable;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.