rant verb (ranted, ranting) 1 intrans to talk in a loud, angry, pompous way. 2 tr & intr to declaim in a loud, pompous, self-important way. noun 1 loud, pompous, empty speech. 2 an angry tirade. ranter noun someone, especially a preacher, who rants. ranting noun, adj. rantingly adverb. ETYMOLOGY: 16c: from Dutch ranten to rave.