1 [jahr-guhn, -gon]
the language, especially the vocabulary, peculiar to a particular trade, profession, or group: medical jargon.
unintelligible or meaningless talk or writing; gibberish.
any talk or writing that one does not understand.
language that is characterized by uncommon or pretentious vocabulary and convoluted syntax and is often vague in meaning.
verb (used without object)
to speak in or write jargon; jargonize.

1300–50; Middle English jargoun < Middle French; Old French jargon, gargun, derivative of an expressive base *garg-; see gargle, gargoyle

jargony, jargonistic, adjective
jargonist, jargoneer, noun

1. See language. 2. babble, gabble, twaddle.
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2 [jahr-gon]
a colorless to smoky gem variety of zircon.
Also, jargoon [jahr-goon] .

1760–70; < French < Italian giargonePersian zargūn gold-colored

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World English Dictionary
jargon1 (ˈdʒɑːɡən)
1.  specialized language concerned with a particular subject, culture, or profession
2.  language characterized by pretentious syntax, vocabulary, or meaning
3.  gibberish
4.  another word for pidgin
5.  (intr) to use or speak in jargon
[C14: from Old French, perhaps of imitative origin; see gargle]

jargon or jargoon2 (ˈdʒɑːɡɒn, dʒɑːˈɡuːn)
rare mineralogy a golden yellow, smoky, or colourless variety of zircon
[C18: from French, from Italian giargone, ultimately from Persian zargūn of the golden colour; see zircon]
jargoon or jargoon2
[C18: from French, from Italian giargone, ultimately from Persian zargūn of the golden colour; see zircon]

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Word Origin & History

mid-14c., "unintelligible talk, gibberish," from O.Fr. jargon "a chattering" (of birds), ultimately of echoic origin (cf. L. garrire "to chatter," Eng. gargle). Often applied to something the speaker does not understand, hence meaning "mode of speech full of unfamiliar terms" (1650s).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

jargon definition

A special language belonging exclusively to a group, often a profession. Engineers, lawyers, doctors, tax analysts, and the like all use jargon to exchange complex information efficiently. Jargon is often unintelligible to those outside the group that uses it. For example, here is a passage from a computer manual with the jargon italicized: “The RZ887-x current loop interface allows the computer to use a centronics blocked duplex protocol.” (See slang.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
This is no surprise; column inches strewn with impenetrable jargon are a tough
Knowing the jargon of tour operators will help in planning your trip.
All special groups, including sociologists, develop their own jargon.
Goodman shows a talent for making clinical jargon sound downright poetic.
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