Noun 1. rant - a loud bombastic declamation expressed with strong emotion
harangue, ranting
declamation - vehement oratory
screed - a long monotonous harangue
2. rant - pompous or pretentious talk or writing
blah, bombast, claptrap, fustian
grandiloquence, grandiosity, magniloquence, ornateness, rhetoric - high-flown style; excessive use of verbal ornamentation; "the grandiosity of his prose"; "an excessive ornateness of language"
Verb 1. rant - talk in a noisy, excited, or declamatory manner
jabber, mouth off, rabbit on, rave, spout
mouth, speak, talk, verbalise, verbalize, utter - express in speech; "She talks a lot of nonsense"; "This depressed patient does not verbalize"