• Log Jam. Adirondack Mountains, New York
    Log Jam. Adirondack Mountains, New York
  • WordNet 3.6
    • v jam interfere with or prevent the reception of signals "Jam the Voice of America","block the signals emitted by this station"
    • v jam block passage through "obstruct the path"
    • v jam crush or bruise "jam a toe"
    • v jam crowd or pack to capacity "the theater was jampacked"
    • v jam get stuck and immobilized "the mechanism jammed"
    • v jam push down forcibly "The driver jammed the brake pedal to the floor"
    • v jam press tightly together or cram "The crowd packed the auditorium"
    • n jam deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
    • n jam preserve of crushed fruit
    • n jam a dense crowd of people
    • n jam informal terms for a difficult situation "he got into a terrible fix","he made a muddle of his marriage"
    • ***

Additional illustrations & photos:

woman and maid bringing jam and cake woman and maid bringing jam and cake

Webster's Revised Unabridged Dictionary
  • Interesting fact: Pearl Jam's first album, 10, was named in tribute of basketball player Mookie Blaylock who's number is 10
    • Jam A difficult situation; as, he got himself into a jam .
    • n Jam jăm A kind of frock for children.
    • Jam A mass of people or objects crowded together; also, the pressure from a crowd; a crush; as, a jam in a street; a jam of logs in a river.
    • n Jam A preserve of fruit boiled with sugar and water; also called jelly; as, raspberry jam; currant jam; grape jam.
    • Jam An injury caused by jamming.
    • n Jam (Mining) See Jamb.
    • Jam To block or obstruct by packing too much (people or objects) into; as, shoppers jammed the aisles during the fire sale.
    • Jam (Naut) To bring (a vessel) so close to the wind that half her upper sails are laid aback.
    • Jam To cause to become nonfunctional by putting something in that blocks the movement of a part or parts; as, he jammed the drawer by putting in too many loose papers; he jammed the lock by trying to pick it.
    • Jam To crush or bruise; as, to jam a finger in the crack of a door.
    • Jam (Radio) To interfere with (a radio signal) by sending other signals of the same or nearby frequency; as, the Soviets jammed Radio Free Europe broadcasts for years during the cold war.
    • Jam To press into a close or tight position; to crowd; to squeeze; to wedge in; to cram; as, rock fans jammed the theater for the concert. "The ship . . . jammed in between two rocks."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: Many wonder what the difference is between jelly, preserves, jam, and marmalade. In all cases, jelly is the common denominator. Jelly is fruit juice with added sugar, cooled and congealed, usually by the addition of gelatin or pectin. Preserves preserve the largest percentage of the original fruit, containing whole chunks of it in addition to jelly. Jam is jelly plus fruit pulp. Marmalade has bits of fruit and the rinds in a jelly. Although the orange variety is most common, it is often made from other citrus fruits. Spread either of the four on toast, add a nice cup of tea, and you have one sweet treat.
    • jam To press; squeeze; thrust or press down or in with force or violence; thrust or squeeze in so as to stick fast; press or crowd in such a manner as to prevent motion or hinder extrication.
    • jam To fill full; block up; prevent the movement of by pressure, crowding, etc.
    • jam To tread hard or make firm by treading, as land is trodden hard by cattle.
    • jam To become wedged together or in place, as by violent impact; stick fast: as, the door jams.
    • n jam A crush; a squeeze; pressure by thrusting or crowding.
    • n jam A crowd of objects irregularly and tightly pressed together by arrest of their movement; a block, as of people, vehicles, or floating logs.
    • n jam A conserve of fruits prepared by boiling them to a pulp in water with sugar.
    • n jam Another spelling of jamb, 4.
    • jam To push (a bill or measure) through the regular routine of a legislative body by the brute force of a majority controlled by ‘the machine,’ without proper consideration or discussion. [Political slang.]
    • n jam An extra pool in the game of napoleon.
    • jam To smear or spread with jam: as, a slice of bread thickly jammed.
    • jam To become jam; thicken to the consistency of jam.
    • n jam The title of certain native chiefs in northwestern India.
    • n jam In England, a kind of dress worn by children: so called from the Hindu jama, a long muslin gown worn in India by both Mohammedans and Hindus.
    • n jam An abbreviation of Jamaica.
    • ***
Chambers's Twentieth Century Dictionary
    • n Jam jam a conserve of fruit boiled with sugar.
    • v.t Jam jam to press or squeeze tight
    • pr.p Jam jam′ming; pa.p. jammed
    • n Jam a crush, squeeze
    • ***


  • Larry King
    Larry King
    “I'm the worst person to be stuck with in a traffic jam.”
  • Gilbert K. Chesterton
    “It is as healthy to enjoy sentiment as to enjoy jam.”
  • Source Unknown
    Source Unknown
    “There are no traffic jams in the second mile.”
  • Source Unknown
    Source Unknown
    “The Extra Mile will have no traffic jams.”
  • Lewis Carroll
    “The rule is, jam tomorrow and jam yesterday --but never jam today.”
  • Ernest Hemingway
    “The age demanded that we dance and jammed us into iron pants. And in the end the age was handed the sort of shit that it demanded.”


In a jam - If you are in a jam, you are in some trouble. If you get out of a jam, you avoid trouble.
Jam on your face - If you say that someone has jam on their face, they appear to be caught, embarrassed or found guilty.
Jam tomorrow - (UK) This idiom is used when people promise good things for the future that will never come.
Money for jam - If something's money for jam, it's a very easy way of making money.


Webster's Revised Unabridged Dictionary
Either fr. jamb, as if squeezed between jambs, or more likely from the same source as champ, See Champ


In literature:

The caramel pudding rather overflowed the jam pot.
"Priscilla's Spies" by George A. Birmingham
The levels outside our building were still jammed with an excited throng.
"Tarrano the Conqueror" by Raymond King Cummings
Henry jammed his brake on so suddenly that it toppled him from the saddle, but neither he nor the machine was injured.
"The Secret Wireless" by Lewis E. Theiss
The jam, the whole jam, was moving at last.
"Blazed Trail Stories" by Stewart Edward White
Then that sickening gag was jammed into my mouth.
"The Grammar School Boys of Gridley" by H. Irving Hancock
He was jammed against Wilbur and couldn't get his hand in his pocket.
"Mezzerow Loves Company" by Floyd L. Wallace
You stumbled, slipped, twisted your feet, jamming them in the wide interstices between the slabs.
"Across Unknown South America" by Arnold Henry Savage Landor
Come, all, and bust the jam!
"Joan of Arc of the North Woods" by Holman Day
The jam, the whole jam, was moving at last.
"Americans All" by Various
Meanwhile, he sat down and gloated over the jam tart, devouring it in imagination.
"Freaks on the Fells" by R.M. Ballantyne

In poetry:

stop sputtering like a jammed machine gun!
read the verdict."
"Gioconda And Si-Ya-U" by Nazim Hikmet
He never rides in trucks or trams,
In taxicabs or omnibuses,
And so keeps out of traffic jams
And other hippopotomusses.
"Habits of the Hippopotamus" by Arthur Guiterman
Wonder what they'll have for tea;
Hope the jam is strawberry.
Wonder what the dance and game;
Feel so very glad they came.
"First Arrivals" by Kate Greenaway
Three men I saw beside a bar,
Regarding o'er their bottle,
A frog who smoked a rank cigar
They'd jammed within its throttle.
"The Smoking Frog" by Robert W Service
Wrong or justice, joy or sorrow,
In the present what are they
while there's always jam-tomorrow,
While we tread the onward way?
Never knowing where we're going,
We can never go astray.
"Evolutionary Hymn" by C S Lewis
I hope the ladies and gentlemen of Dundee will try and learn knowledge
At home in Dundee in their nice little College,
Because knowledge is sweeter than honey or jam,
Therefore let them try and gain knowledge as quick as they can.
"The Inauguration of the University College" by William Topaz McGonagall

In news:

How much holiday spirit can you jam into one weekend.
Moving Pictures / Music OutOfFocus.TV Profiles Natural Child, PUJOL Jams in a Van at Bonnaroo, MTV Hive Debuts Turbo Fruits' 'Harley Dollar Bill $'.
Taking a break from filming Camp Rock: The Final Jam, the two eldest Jonas Brothers Kevin and Joe went out for a night of entertainment with two lovely ladies by their side.
Avett Brothers Jam at Voodoo Experience.
Last night in NYC, Tr3s executives announced the cable network's jam-packed 2012-2013 lineup.
Simon, who is a self-taught musician and tap dancer, has worked in Harlem jazz clubs and jammed with jazz artists including Dave Gibson, Andy McLeod and Patience Higgins.
Saul Kaufman loves his balcony jam packed with plants at Dithridge House in North Oakland.
Singer Justin Bieber attends the Island Def Jam Spring Collection party at Stephen Weiss Studio on May 20, 2009 in New York City.
(Photo by Theo Wargo/Getty Images for Island Def Jam).
The line-up is über-eclectic with electro-jams by STS9 and BLVD,Galactic's N'arlins grooves, neo-soul by India.
While I might be a diehard fan of loud, brash, and noise-heavy jams, there is a special place in my heart—and my over-cramped iPod—for sonic whimsy.
Traffic around Los Angeles International Airport may be more jammed than usual on Wednesday because of a union workers march.
0 Traffic around Los Angeles International Airport may be more jammed than usual on Wednesday because of a union workers march.
The Greatest Jam on Earth.
For many jam-band fans, a double bill featuring.

In science:

Our definition of the maximally random jammed (MRJ) state is based on the minimization of an order parameter described below.
Is Random Close Packing of Spheres Well Defined?
The set of all jammed states will define a certain region in the ndimensional space of order parameters.
Is Random Close Packing of Spheres Well Defined?
Nevertheless, the salient features of this plot are as follows: (1) all sphere structures must lie within the bounds and (2) the jammed structures are a special subset of the allowable structures .
Is Random Close Packing of Spheres Well Defined?
We have measured both T and Q for the jammed structures generated by the Lubachevsky-Stillinger algorithm and have plotted the results in the Q-T plane in Fig. 2b .
Is Random Close Packing of Spheres Well Defined?
Therefore, in seeking to determine the MRJ state using T and Q, one would search for jammed structures that minimize Q, the more sensitive of the two measures.
Is Random Close Packing of Spheres Well Defined?