What is the meaning of Ignoramus?

A totally ignorant person—unknowledgeable, uneducated, or uninformed; a fool.

A grand jury's ruling on an indictment when the evidence is determined to be insufficient to send the case to trial.

To make such a ruling against (an indictment).

first-person plural present active indicative of ignōrō

first-person plural pluperfect active indicative of ignōscō

Source: wiktionary.org