Definify.com
Webster 1913 Edition
Quack
Quack
,Verb.
I.
[
imp. & p. p.
Qvacked
; p. pr. & vb. n.
Quacking
.] [Of imitative origin; cf. D.
kwaken
, G. quacken
, quaken
, Icel. kvaka
to twitter.] 1.
To utter a sound like the cry of a duck.
2.
To make vain and loud pretensions; to boast.
“ To quack of universal cures.” Hudibras.
3.
To act the part of a quack, or pretender.
Quack
,Noun.
1.
The cry of the duck, or a sound in imitation of it; a hoarse, quacking noise.
Chaucer.
3.
Hence, one who boastfully pretends to skill or knowledge of any kind not possessed; a charlatan.
Quacks
political; quacks
scientific, academical. Carlyle.
Quack
,Adj.
Pertaining to or characterized by, boasting and pretension; used by quacks; pretending to cure diseases;
as, a
quack
medicine; a quack
doctor.Webster 1828 Edition
Quack
QUACK
, v.i.1.
To cry like a duck or goose.2.
To boast; to bounce; to talk noisily and ostentatiously; as, pretenders to medical skill quack of their cures.QUACK
,Noun.
1.
A boaster; one who pretends to skill or knowledge which he does not possess.2.
A boastful pretender to medical skill which he does not possess; an empiric; an ignorant practitioner.