Definition of "lampoon"

To say truth, Ma'am, 'tis very vulgar to Print and as my little Productions are mostly Satires and Lampoons I find they circulate more by giving copies in confidence to the Friends of the Parties—

1777, Richard Brinsley Sheridan, The School for Scandal, I.i

"Dangerous things, sir—dangerous things!" exclaimed Mr. Lintot, drawing a deep breath of air from the open window: "do you know, sir, Curl published a lampoon on Lord Hervey the other day, who said that he would have horsewhipped him if he could have found his way into the city...

1837, L[etitia] E[lizabeth] L[andon], “Alteration”, in Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], page 22