Main definitions of quack in English

: quack1quack2

quack1

noun

  • [in singular] The characteristic harsh sound made by a duck.

    • ‘But even from the vague hints he throws out, I think we may rest assured it will not be the last quack of a lame duck.’
    • ‘All this takes place in quacks, of course, but the detailed character animation conveys a wide range of emotions.’
    • ‘This is an interesting link for anyone who was wondering about those duck quacks.’
    • ‘I'm sorry to say that it's not true about the quack of a duck.’
    • ‘I heard a thump and a quack, and guessed that he'd run into the wall (head first, as usual).’
    • ‘These sounds, called clicks, can be produced in such rapid succession as to sound like a buzz or even a duck-like quack.’
    • ‘One theory is that the sound of the quack tails away, which makes the echoes difficult to hear.’
    • ‘As we took off, I could hear a faint quack of relief from Archie's new acquaintances.’

verb

[NO OBJECT]
  • 1 (of a duck) make a characteristic harsh sound.

    • ‘They sat at the edge of the lake where a bunch of ducks came up and quacked at them.’
    • ‘Down near the pond, the ducks were quacking at an old couple that was throwing pieces of stale bread at them.’
    • ‘Professor Cox said: ‘A duck quacks rather quietly, so the sound coming back is at a low level and might not be heard.’’
    • ‘All the ducks are in a row, quacking in the same direction right now, and it seems, you know, that's great.’
    • ‘Internet pages reveal phone conversations with journalists that consist of MacIsaac quacking like a duck before he hangs up.’
    • ‘‘It's starting to walk like a duck and quack like a duck,’ remarked Engelke.’
    • ‘We strolled up a steep street, where wild ducks quacked for food outside a shop, and into a quiet garden.’
    • ‘Ducks wake up and quack and swim away as we pass on the narrow walks, little packs of 20 or so ducks.’
    • ‘Nevertheless, if it looks like a duck, and walks like a duck, and quacks like a duck, it's most likely… a duck.’
    • ‘Yet, in case after case, the chicken always ended up dead, while the duck went happily quacking down the river.’
    • ‘I mean, I'm not gonna quack like a duck for a consequence.’
    • ‘The ducks were quacking and flapping around me loudly, so I thought better of staying in my place.’
    • ‘I trudged out finally, covered in mud and grime, with a few ducks quacking angrily at me.’
    • ‘A duck quacks in English, but a French duck says ‘coin coin’.’
    • ‘The kids were in rapture as they heard the animals bleating, mooing, and quacking.’
    • ‘He may as well have quacked like a duck, because I don't hear a word he's saying.’
    • ‘If it waddles like a duck and quacks like a duck, it's not a swan.’
    • ‘I hope you grow donkey ears and quack like a duck!’
    • ‘She will also turn her attention to Irish ducks, which presumably quack with an agreeable brogue.’
    • ‘If it looks like a duck, quacks like a duck, is it still a duck?’
    1. 1.1informal Talk loudly and foolishly.
      • ‘Ever since Ride the Ducks came to town, I've watched those vessels drive by, its frenzied tourists quacking away.’
      • ‘Some of these remedies have been closer to quack concoctions.’

Origin

Mid 16th century (as a verb): imitative.

Pronunciation:

quack

/kwak/

Main definitions of quack in English

: quack1quack2

quack2

noun

  • A person who dishonestly claims to have special knowledge and skill in some field, typically in medicine.

    [as modifier] ‘quack cures’
    • ‘They are saying they do not want the project to go ahead, full stop, because it is quack medicine.’
    • ‘It helps if you can whip the populace into a panic like some snake oil salesman, then sell them the quack cure.’
    • ‘Among the modern evils to fall under Ince's scrutiny was quack alternative medicine.’
    • ‘Actually, much of the licensing and regulation is aimed at protecting the public from frauds and quacks.’
    • ‘A lifestyle guru is a modern sort of mountebank, selling quack advice instead of false medicines.’
    • ‘But why wouldn't they believe the claims of the detox quacks?’
    • ‘The new rule is to regularise the practice of traditional Indian systems of medicine and to prevent quacks.’
    • ‘You are drawn to the plight of the bird in the air pump, the sad and frightened girls and the wild eyes of the quack scientist.’
    • ‘Depressed by the abundance of absurd claims for quack alternative therapies, he had set up the site as a credulity experiment.’
    • ‘As with most quack cure claims about ‘toxins’, the actual toxins were not named.’
    • ‘Not all ‘alternative’ medicine advocates, however, are quacks.’
    • ‘There are food faddists, and quacks in the medical field, and persons who oppose fluoridation of water.’
    • ‘My comments on quack medicine have brought on challenges from some readers.’
    • ‘It is to help those who have fallen for the lies and deceit of quack medicine and pseudoscience.’
    • ‘An alternative medicine quack reckoned he could cure Faulkner of his twitching with a six-month course of treatment.’
    • ‘As we've said before, that's a totally quack claim.’
    • ‘But similarly, a new-age quack healer would disagree with a brain surgeon.’
    • ‘He despised quacks and charlatans because he admired the power of thought and reason so profoundly.’
    • ‘We should be looking at changing our lifestyles, not stuffing ourselves full of quack medicine.’
    • ‘I've met very conscientious chiropractors in the past, but the field also seems to attract a number of quacks.’
    swindler, charlatan, mountebank, confidence trickster, fraud, fraudster, impostor, trickster, racketeer, hoaxer, sharper, rogue, villain, scoundrel
    View synonyms

Origin

Mid 17th century: abbreviation of earlier quacksalver, from Dutch, probably from obsolete quacken prattle + salf, zalf (see salve).

Pronunciation:

quack

/kwak/