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[jel] /dʒɛl/
verb (used without object)
to congeal; become jellylike in consistency.
to become clear, substantial, or definite; crystallize:
The plan began to jell once we all met to discuss it.
verb (used with object)
to cause to jell.
Origin of jell
1820-30; back formation from jelly
Related forms
half-jelled, adjective
unjelled, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for jell


verb jells, jelling, jelled, gels, gelling, gelled
to make or become gelatinous; congeal
(intransitive) to assume definite form: his ideas have jelled
(US) an informal word for jelly1
Word Origin
C19: back formation from jelly1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for jell

1830, American English, probably a back-formation of jelly (v.). Related: Jelled; jelling. Figurative sense is first attested 1908. Middle English had gelen "congeal," but it disappeared 15c.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for jell



  1. Empty and idle talk; mendacious and exaggerated claims; bullshit: Most of what I say is pure gas, my friend (1847+)
  2. Talk of any sort, esp conversation: Let's get together for a good gas (1852+)
  3. Denatured alcohol or some other substitute for liquor (1940s+ Hoboes)
  4. A fastball: He got him out on the high gas (1980s+ Baseball)
  5. gasser: ''What a gas!'' she cried on the way from the courthouse (1957+)
  6. Anabolic steroids, used to increase body bulk: He said about 60 percent of the wrestlers he knew during the 1980s used steroids, commonly known as ''juice'' or ''gas'' (1980s+ Athletes)


  1. Talked: I haven't gassed this long for a year
  2. To impress one's hearers very favorably; overcome with admiration: Bird gassed them/ She gassed me, she was that good (1940s+ Cool talk)
  3. To impress an audience very unfavorably; fail with: Our show appears to have gassed both the critics and the public (1970s+)

Related Terms

cook with gas, run out of gas, step on it

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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