Meaning

noun a loud bombastic declamation expressed with strong emotion

noun pompous or pretentious talk or writing

verb talk in a noisy, excited, or declamatory manner

originFrom Dutch ranten, randen (“to talk nonsense, rave”), from Middle Dutch ranten (“to rant, babble, goof around”), of uncertain origin; but apparently related to Middle High German ranzen (“to dance, jump around, frolic”), German ranzen (“to be ardent, be in heat, copulate, mate, ramble, join up”).

Etymology from Wiktionary, CC BY-SA 3.0