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Deceitful boasting, a deceptive claim, or a continuing assertion prejudicial to the right of another.

One form of jactitation at Common Law is slander of title—defaming another person's title to real property. Some jurisdictions provide a remedy when the injured party brings an action for jactitation.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.


a false claim that tends to harm another person. A false assertion that one is married to another was formerly actionable at law.
Collins Dictionary of Law © W.J. Stewart, 2006

JACTITATION. OF MARRIAGE, Eng. eccl. law. The boasting by an individual that he or she has married another, from which it may happen that they will acquire the reputation of being married to each other.
     2. The ecclesiastical courts may in such cases entertain a libel by the party injured; and, on proof of the facts, enjoin the wrong-doer to perpetual silence; and, as a punishment, make him pay the costs. 3 Bl. Com. 93; 2 Hagg. Cons. R. 423 Id. 285; 2 Chit. Pr. 459.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.