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LIEGE POUSTIE, Scotch law. The condition or state of a person who is in his ordinary health and capacity, and not a minor, nor cognosced as an idiot or madman, nor under interdiction. He is then said to be in liege poustie, or in legitima potestati, and he has full power of disposal of his property. 1 Bell's Com. 85, 5th ed.; 6 Clark & Fin. 540. Vide Sui juris.