boon
1 Americannoun
noun
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something extremely useful, helpful, or beneficial; a blessing or benefit
the car was a boon to him
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archaic a favour; request
he asked a boon of the king
adjective
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close, special, or intimate (in the phrase boon companion )
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archaic jolly or convivial
Other Word Forms
Etymology
Origin of boon1
First recorded in 1150–1200; Middle English bon(e) “praying, a prayer, favor asked for,” from Old Norse bōn “prayer, request, petition”; cognate with Old English bēn
Origin of boon2
First recorded in 1300–50; Middle English bon(e), boun “good, goodly,” from Old French, from Latin bonus “good, expert”
Origin of boon3
First recorded in 1350–1400; Middle English (north) bun(n)e, bone “reed, stem, husk (of flax)”; compare Old English bune “reed; drinking cup”
Explanation
Boon means something beneficial to a specific person, entity, or cause. "Getting called out of school on the day of the test was a boon for Sam, as he hadn't remembered to study." Boon derives from the Old Norse bón, a request for a favor. Think of a boon as a favor that no one has necessarily asked for, something extra. "We'd just spent our last dollar on a cup of coffee so it was a real boon to find a ten dollar bill lying on the sidewalk." Boon can also be an adjective for someone friendly and welcoming, as in "a boon companion."
Vocabulary lists containing boon
100 SAT Words Beginning with "B"
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Mythology
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Beowulf vocabulary
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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.
To achieve this, Boon and co-author Eva-Maria Strauch, PhD, an associate professor of medicine with expertise in antivirals and protein design, selected proteins from H5N1 strains known to infect humans.
From Science Daily • Feb. 4, 2026
“Good Boy,” by Jan Komasa, has an arresting star turn by Anson Boon as a ruffian who gets chained up in a rich family’s cellar until he agrees to behave.
From Los Angeles Times • Sep. 8, 2025
A new-look team captained by Allan Border and featuring the likes of Steve Waugh and David Boon won the 1987 World Cup and secured Test series victories over England and the West Indies.
From BBC • Aug. 16, 2025
The genre is nothing new, she quips, having long been "championed" by publishers such as Mills & Boon.
From BBC • Jun. 20, 2025
Even though Shirley Boon, with her big know-it-all smile, kind a irritate me.
From "The Help" by Kathryn Stockett
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
