What does "quack" mean?
The sound made by a duck.
Quack
/kwæk/ adj, intj, noun, verb, slang
adj, intj, noun, verb, slang ·Common ·High school level
Meaning at a glance
- Primary sense: The sound made by a duck.
- Grammar: quack is listed as adj, intj, noun, verb, slang.
- Nearest alternatives: baa, blagueur, bluff, bluffer.
- Useful contrasts: authentic, calm, credentialed doctor.
- Usage evidence: The cow goes "moo," the rooster goes "cock-a-doodle-doo," the pig goes "oink, oink," the duck goes "quack, quack" and the cat goes "meow."
How to use "quack"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "quack" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "quack" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "quack" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "quack" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "quack" is acting as adj, intj, noun, verb, slang in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "baa" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
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Final meaning check
Before publishing a sentence with "quack", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 The sound made by a duck.
"Did you hear that duck make a quack?"
- 2 A fraudulent healer, especially a bombastic peddler in worthless treatments, a doctor who makes false diagnoses for monetary benefit, or an untrained or poorly trained doctor who uses fraudulent credentials to attract patients derogatory
"That doctor is nothing but a lousy quack!"
- 3 the harsh sound of a duck wordnet
- 4 Any similar charlatan or incompetent professional. derogatory, figuratively
"The very quaik of faſhions, the very hee that / VVeares a Steletto on his chinne."
- 5 an untrained person who pretends to be a physician and who dispenses medical advice wordnet
Show 1 more definition
- 6 Any doctor. derogatory, humorous, mildly, slang
"That quack wants me to quit smoking, eat less, and start exercising. The nerve!"
Verb
- 1 To make a noise like a duck.
"The more breadcrumbs I threw on the ground, the more they quacked."
- 2 To practice or commit quackery (fraudulent medicine).
"[…] it is incredible, and scarce to be imagin’d, how the Posts of Houses, and Corners of Streets were plaster’d over with Doctors Bills, and Papers of ignorant Fellows; quacking and tampering in Physick, and inviting the People to come to them for Remedies;"
- 3 act as a medical quack or a charlatan wordnet
- 4 Of a queen bee: to make a high-pitched sound during certain stages of development. intransitive
- 5 To make vain and loud pretensions. obsolete
"Seek out for Plants with Signatures To Quack of Universal Cures"
Show 1 more definition
- 6 utter quacking noises wordnet
Adjective
- 1 Falsely presented as having medicinal powers.
"Don't get your hopes up; that's quack medicine!"
Adjective
- 1 medically unqualified wordnet
Intj
- 1 A duck's quack.
Example
"The cow goes "moo," the rooster goes "cock-a-doodle-doo," the pig goes "oink, oink," the duck goes "quack, quack" and the cat goes "meow.""
Common questions
What is a synonym for "quack"?
Common synonyms include: baa, blagueur, bluff, bluffer, boast, bogus.
How do you use "quack" in a sentence?
The cow goes "moo," the rooster goes "cock-a-doodle-doo," the pig goes "oink, oink," the duck goes "quack, quack" and the cat goes "meow."
How do you pronounce "quack"?
Pronounced /kwæk/.
Etymology
Etymology 1
From Middle English *quacken, queken (“to croak like a frog; make a noise like a duck, goose, or quail”), from quack, qwacke, quek, queke (“quack”, interjection and noun), also kek, keke, whec-, partly of imitative origin and partly from Middle Dutch quacken (“to croak, quack”), from Old Dutch *kwaken (“to croak, quack”), from Proto-West Germanic *kwakōn, from Proto-Germanic *kwakaną, *kwakōną (“to croak”), of imitative origin. Cognate with Saterland Frisian kwoakje, kwaakje (“to quack”), Middle Low German quaken (“to quack, croak”), German quaken (“to quack, croak”), Danish kvække (“to croak”), Swedish kväka (“to croak, quackle”), Norwegian kvekke (“to croak”), Icelandic kvaka (“to twitter, chirp, quack”).
Etymology 2
Clipping of quacksalver (see there for more), of Dutch origin; ultimately related to Etymology 1 above.