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ignoramus

American  
[ig-nuh-rey-muhs, -ram-uhs] / ˌɪg nəˈreɪ məs, -ˈræm əs /

noun

plural

ignoramuses
  1. an extremely ignorant person.

    Synonyms:
    simpleton, know-nothing, dunce, fool

ignoramus British  
/ ˌɪɡnəˈreɪməs /

noun

  1. an ignorant person; fool

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ignoramus

1570–80; < Latin ignōrāmus we ignore (1st person plural present indicative of ignōrāre to be ignorant of, ignore ); hence name of an ignorant lawyer in the play Ignoramus (1615) by the English playwright G. Ruggle, whence current sense

Explanation

If you've ever been afraid to speak up in class, you might be worried that you'll look like an ignoramus, or an uneducated, ignorant person. Calling someone an ignoramus is an insult — it's a colorful way to comment on a person's ignorance or stupidity. The word comes right from the Latin ignoramus, literally "we do not know," which was a legal term in the 16th century that could be used during a trial when the prosecution presented insufficient evidence. After George Ruggle's 1615 play "Ignoramus", it came into popular use to mean "fool" or "dunce."

Keep Reading on Vocabulary.com

Vocabulary lists containing ignoramus

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"The nationalist is by definition an ignoramus," Yugoslav writer Danilo Kiš observed.

From Salon • Apr. 12, 2022

The term ignoramus was written on bills of indictment when the evidence presented seemed insufficient to justify prosecution.

From Fox News • Mar. 30, 2020

At the risk of sounding like a complete ignoramus, I learned several new words and a term which is always fun: macher, shtetl, and work blue.

From Los Angeles Times • Jan. 12, 2019

Bird ignoramus that I am, I’m paired with an eagle-eyed National Park employee who, for the length of our six-hour hike, abides my frantic cries of “There’s a bird!” and, sometimes, just “Bird?”

From New York Times • Jul. 28, 2018

“That ignoramus Gowon pledged a miserable, measly amount for more than two million refugees. Did he think it was chickens that died and it is the surviving relatives of those chickens who have returned home?”

From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie