silly
Americanadjective
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weak-minded or lacking good sense; stupid or foolish.
a silly writer.
- Antonyms:
- sensible
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absurd; ridiculous; irrational.
a silly idea.
- Synonyms:
- preposterous, nonsensical, asinine, inane
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humorous and playful in a clownish, whimsical, or exaggerated way; showing unrestrained high spirits.
With a few April Fools’ Day tricks, students have a respite from seriousness and get to just be silly and laugh.
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He knocked me silly.
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Cricket. (of a fielder or the fielder's playing position) extremely close to the batsman's wicket.
silly mid off.
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Archaic. rustic; plain; homely.
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Archaic. weak; helpless.
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Obsolete. lowly in rank or state; humble.
noun
adjective
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lacking in good sense; absurd
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frivolous, trivial, or superficial
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feeble-minded
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dazed, as from a blow
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obsolete homely or humble
noun
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(modifier) cricket (of a fielding position) near the batsman's wicket
silly mid-on
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Also called: silly-billy. informal a foolish person
Usage
Where does silly come from? You have probably heard someone say that language is constantly changing. We are definitely guilty of saying that here at Dictionary.com. But what does that mean exactly? Well, the story of the word silly is one clear—and fascinating—illustration. Languages change in many ways. The sounds and forms of a language can morph. The underlying structures of a language can shift. New words are created. Old words die out. And as we see in the case of silly, the meaning of words can develop in some remarkable ways. Today, we generally use the word silly to describe something as “foolish.” Something silly can be amusing, as when kids make silly faces or play silly games. Something silly can also be, more dismissively, stupid. For example: The politician’s promises were nothing but silly pipedreams. But care to guess what the original sense of silly was? “Blessed.” We’re not being silly. Among the oldest recorded senses of silly—or, more accurately, the word that became our modern word silly—was “spiritually blessed.” Those senses are recorded in the early 1200s. So how did we get to “foolish”?Dig deeperSilly ultimately comes from the Old English (c. 450–c1150) word gesǣlig, meaning “happy, blessed.” Talk about language change! Let’s break this gesǣlig down. That ge- is an Old English prefix that was effectively lost. That -ig became -y, which is all over English today, as in juicy or dreamy. And sǣl meant “happiness.”During Middle English (c1150–1475), this gesǣlig developed into new forms (see our entry at the archaic word seely) and many new senses. The word acquired the senses of “holy, innocent, helpless,” then “pitiable” and “insignificant,” then “simple” and “ignorant.” By the mid- to late 1500s, silly had gained the meaning of “lacking good sense, foolish, irrational, ridiculous.”It’s hard to say why, exactly, but there may be something of a through-line in the incredible sense development of silly. Something “happy” can be considered “favored by God.” Something “favored by God” can be considered “holy,” and so “innocent,” which may be said of a small animal or child who is “harmless” or “defenseless.” (Are you following us so far?) And if you can’t protect yourself or you lack power, you might be considered “worthless” or “miserable”—and so silly apparently jumps to “foolish.”
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Adjectives
Etymology
Origin of silly
First recorded in 1375–1425; earlier sylie, sillie “foolish, feeble-minded, simple, pitiful”; late Middle English syly, variant of sely seely
Explanation
Silly describes something that can't be taken seriously. You might not mind telling silly jokes, but you don't want to be told a project you've worked hard at is silly. Silly originally meant “happy,” which gives the sense of children's games or harmless jokes. Later, it came to mean “foolish”: silly ideas are looked down on because they're not very smart. Silly can also mean a state of foolishness brought on in a specific way. Your mother “worried herself silly” when you stayed out late, and promised to “slap you silly” when you got home.
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.
See Examples For:
Every summer, lawns fill with colorful "silly sprinklers," whose looping and twisting tubes send water spraying in unusual patterns.
From Science Daily ● Jul. 17, 2026
"A Renegade Zoo song either has a great message or can just be a bit silly."
From BBC ● Jul. 11, 2026
But this is the time of year known in F1 as "silly season", when speculation abounds about driver movements.
From BBC ● Jul. 2, 2026
The reason this distinction matters is that bull markets usually end because of broad excess and tightening liquidity — not because a few flashy IPOs come public at silly valuations.
From MarketWatch ● Jun. 25, 2026
“Humans are trouble dressed up pretty. Especially that greedy idiot King Barf-a-hew or whatever his silly name is.”
From "Rump: The (Fairly) True Story of Rumpelstilskin" by Liesl Shurtliff
The worst outcome I could imagine was a case of the sillies, sleepies, or munchies.
From Slate ● Jun. 13, 2026
Chilly weather brought out the sillies in our giant panda cub, who showed off his somersault style.
From Washington Post ● Feb. 7, 2023
Though once is enough for me, I promise not to find that any more offensive than those flag-decorated pubs full of World Cup sillies.
From The Guardian ● May 31, 2010
If you are the parent of a preschooler, suffice it to say that Raffi, in the throes of middle age, is shaking his sillies out.
From Time Magazine Archive
“Oh, you sillies, it’s just that the power is out. Your eyes still work fine.”
From "The Benefits of Being an Octopus" by Ann Braden
She says they bring out each other's sillier side and they spend most of their time on set "belly laughing about the most random things".
From BBC ● Jun. 27, 2026
The awards, which celebrate the sillier side of science, have held raucous ceremonies that see the winners showered with paper aeroplanes at universities in Massachusetts since 1991.
From Barron's ● Mar. 10, 2026
The scene in which Katya discovers who informed on her dissident father, who subsequently was arrested and never seen again, is a moving moment in an evening largely given over to sillier ones.
From The Wall Street Journal ● Feb. 26, 2026
It’s all the sillier because—to risk taking the president’s goals at face value—there is a way to put lots of American men to work with their hands.
From Slate ● Apr. 14, 2025
"That woman has magic powers. She might decide to turn you into something even sillier than a mouse. A cockroach perhaps."
From "The Witches" by Roald Dahl
“Salmon,” I ask this morning, “can you tell me in your silliest voice what you want in your lunch?”
From Slate ● May 10, 2026
"I took the silliest fall that ultimately resulted in me dislocating my shoulder," Kim said.
From Barron's ● Jan. 8, 2026
It was the silliest episode so far this season, and by some miracle, just about every sketch in the episode worked, at least on a basic comedic level.
From Los Angeles Times ● Nov. 16, 2025
"It's probably one of the silliest races I ever swam. My coach told me to feel the first 50m, and it felt really nice," Tai said with a laugh after the race.
From BBC ● Sep. 7, 2024
Hazel looked at her as if that was the silliest question in the world.
From "Stella by Starlight" by Sharon M. Draper
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.
