/jak'ti tay"sheuhn/ , n.
1. Law. a false boast or claim that causes injury to another.
2. Pathol. jactation (def. 2).
[ 1625-35; jactitation- (s. of jactitatio ) tossing, equiv. to L jactitat ( us ) (ptp. of jactitare, freq. of jactare to throw about; see JACTATION) + -ion- -ION ]