v.
intr. To speak or write in an angry or violent manner; rave. v.
tr. To utter or express with violence or extravagance: a dictator who ranted his vitriol onto a captive audience. n.
Violent or extravagant speech or writing.
A speech or piece of writing that incites anger or violence: "The vast majority [of teenagers logged onto the Internet] did not encounter recipes for pipe bombs or deranged rants about white supremacy"(Daniel Okrent).