Webster's Revised Unabridged Dictionary · 1913

Rant

Rant (rant) , intransitive verb

[OD. ranten, randen, to dote, to be enraged.]

To rave in violent, high-sounding, or extravagant language, without dignity of thought; to be noisy, boisterous, and bombastic in talk or declamation; as, a ranting preacher.
Look where my ranting host of the Garter comes! — Shakespeare

Rant , noun

High-sounding language, without importance or dignity of thought; boisterous, empty declamation; bombast; as, the rant of fanatics.
This is a stoical rant, without any foundation in the nature of man or reason of things. — Atterbury