2 chiefly Scotland : boy
3 a : a crazy person
b : simpleton
Did You Know?
There are a number of theories about the origin of loon as it refers to a crazy person, its most common current meaning. One is that it comes from loony, meaning "crazy." But based on currently available evidence, loony is a late 19th-century alteration of lunatic that didn't come into use until decades after the meaning of loon in question. (It's still possible that loony influenced the development and spread of this meaning of loon.) Another guess is that this loon is from the avian loon, inspired either by the bird's maniacal cry or its displays to distract predators, such as skittering over water with its neck crooked. This is certainly possible, and is the origin story favored by some. But the story our dictionaries favor is a bit more quotidian: the current use of loon developed from earlier uses, primarily in Scottish and other northern dialects of British English, of loon to refer to a lout (an awkward, brutish person) or idler (someone who is idle, lazy, or inactive). While that loon, which is from Middle English loun, never spread to British English more broadly, immigrants from the regions where it was used had a significant influence on American English, and it's not far-fetched to posit that their loon developed into the distinctly American use of the word to refer to daffy people.
"He eagerly races by local cop Tom … at 300 mph, unwittingly shedding magical blue hair as he goes. He also teases Crazy Carl …, the local loon who no one believes when he insists he's seen a blue alien. If you didn't know any better, you'd think Sonic wanted to get caught so he could have a family, friends, heck—a connection with anyone." — Dan Hudak, The Monterey County (California) Weekly, 13 Feb. 2020
"The third subscription … was Rolling Stone, the best introduction to counter-culture a 10-year-old could ever ask for…. I never understood the political writing, and I distinctly remember thinking Hunter S. Thompson was a loon. But when it came to the articles about musicians, I hung on every word." — Shane Brown, The Quad-City Times (Davenport, Iowa), 27 Jan. 2020
Test Your Vocabulary with M-W Quizzes
Test Your Vocabulary
Fill in the blanks to complete a word for a person who is very foolish or silly: f _ _ t _ _ r _ r _ i _.VIEW THE ANSWER
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