- The definition of an ignoramus is someone who lacks knowledge or is dumb.
An example of an ignoramus is someone who doesn't know their left from their right.
A man acting like an ignoramus.
Origin of ignoramus; from the name of a lawyer in Geo. Ruggle's play Ignoramus (1615); Classical Latin literally , we take no notice (a legal term formerly written on a bill of indictment by a grand jury that finds it to be not a true bill)
Origin of ignoramusFrom New Latin ignōrāmus, a grand jury's endorsement upon a bill of indictment when evidence is deemed insufficient to send the case to a trial jury, from Latin, we do not know, first person pl. present tense of ignōrāre, to be ignorant; see ignore.
(plural ignoramuses or ignorami)
After the ignorant lawyer Ignoramus, the titular character in the 1615 play Ignoramus by the English playwright Georges Ruggle; from Latin ignōrāmus (“we do not know, we are ignorant of”), the first-person plural present active indicative of īgnōrō (“I do not know, I am unacquainted with, I am ignorant of”).
Directly from Latin ignōrāmus (“we do not know”).