from The American Heritage® Dictionary of the English Language, 4th Edition
- n. In psychoanalysis, the tendency or drive to achieve pleasure and avoid pain as the chief motivating force in behavior.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (psychoanalysis) the governing principle of the id; the principle that an infant seeks gratification and fails to distinguish fantasy from reality
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