Duhaime's Law Dictionary Jactitation Definition: A false boast designed to increase standing at the expense of another. Related Terms: Slander of Title A false boast designed to increase standing at the expense of another. In the Radin Law Dictionary: "Jactitation: giving out or asserting; letting to be known." The tort of slander of title is a form of jactitation. The term is used mostly in law to refer to jactitation of marriage. For example, none other than the prestiguous Jowitt's Dictionary of English Law proposes that the term is defined as follows: "Jactitation: a false pretension to marry." Jactitation used to form the basis of an ancient legal petition called jactitation of marriage wherein a person could be ordered by the courts to cease claims of being married to a certain person when, in fact, they were not married. Or, as Radin defines it: "The wrongful assertion of any person that he or she is married to another." REFERENCES: Radin, Max, Radin Law Dictionary (New York: Oceana Publiations, 1955), page 174 Categories & Topics: Duhaime's Ancient Common Law Dictionary Duhaime's Family Law Dictionary Always looking up definitions? Save time with our search provider (modern browsers only) If you find an error or omission in Duhaime's Law Dictionary, or if you have suggestion for a legal term, we'd love to hear from you!