That man too had been conversing wildly with thin air; Aunt Petunia had seized Dudley’s hand and pulled him across the road to avoid him; Uncle Vernon had then treated the family to a long rant about what he would like to do with beggars and vagrants.
There are no more uses of "rant" in the book.
Show samples from other sources
The captain is ranting and roaring about our lack of military discipline.
She will rant about my grades and the way I dress, but she loves me.