| jam | | |
| n. (food) | 1. jam | preserve of crushed fruit. |
| ~ conserve, conserves, preserves, preserve | fruit preserved by cooking with sugar. |
| ~ strawberry jam, strawberry preserves | made with strawberries. |
| n. (state) | 2. fix, hole, jam, kettle of fish, mess, muddle, pickle | informal terms for a difficult situation.; "he got into a terrible fix"; "he made a muddle of his marriage" |
| ~ difficulty | a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome.; "grappling with financial difficulties" |
| ~ dog's breakfast, dog's dinner | a poor job; a mess.; "they made a real dog's breakfast of that job" |
| n. (group) | 3. crush, jam, press | a dense crowd of people. |
| ~ crowd | a large number of things or people considered together.; "a crowd of insects assembled around the flowers" |
| ~ snarl-up, traffic jam | a number of vehicles blocking one another until they can scarcely move. |
| n. (act) | 4. electronic jamming, jam, jamming | deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems. |
| ~ ecm, electronic countermeasures | electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum. |
| ~ barrage jamming | electronic jamming over a wide range of frequencies simultaneously. |
| ~ selective jamming, spot jamming | electronic jamming of a specific channel or frequency. |
| v. (motion) | 5. jam, mob, pack, pile, throng | press tightly together or cram.; "The crowd packed the auditorium" |
| ~ crowd together, crowd | to gather together in large numbers.; "men in straw boaters and waxed mustaches crowded the verandah" |
| v. (motion) | 6. jam | push down forcibly.; "The driver jammed the brake pedal to the floor" |
| ~ push, force | move with force,.; "He pushed the table into a corner" |
| v. (contact) | 7. crush, jam | crush or bruise.; "jam a toe" |
| ~ bruise, contuse | injure the underlying soft tissue or bone of.; "I bruised my knee" |
| v. (communication) | 8. block, jam | interfere with or prevent the reception of signals.; "Jam the Voice of America"; "block the signals emitted by this station" |
| ~ cut off, disrupt, interrupt, break up | make a break in.; "We interrupt the program for the following messages" |
| ~ barrage jam | jam an entire frequency spectrum.; "During the Cold War, the Soviets routinely barrage jammed to interfere with transmissions from the West" |
| ~ point jam | jam a narrow band of frequencies.; "We can counter point-jamming effectively" |
| ~ spot jam | jam a single frequency.; "This operator is spot-jammed" |
| ~ blanket jam | jam a broad spectrum of frequencies to affect all communications in the area except for directional antenna communications. |
| v. (contact) | 9. jam | get stuck and immobilized.; "the mechanism jammed" |
| ~ malfunction, misfunction | fail to function or function improperly.; "the coffee maker malfunctioned" |
| v. (contact) | 10. chock up, cram, jam, jampack, ram, wad | crowd or pack to capacity.; "the theater was jampacked" |
| ~ stuff | cram into a cavity.; "The child stuffed candy into his pockets" |
| ~ cram | put something somewhere so that the space is completely filled.; "cram books into the suitcase" |
| v. (contact) | 11. block, close up, impede, jam, obstruct, obturate, occlude | block passage through.; "obstruct the path" |
| ~ block off, blockade | obstruct access to. |
| ~ barricado, barricade | block off with barricades. |
| ~ barricade | prevent access to by barricading.; "The street where the President lives is always barricaded" |
| ~ asphyxiate, suffocate, stifle, choke | impair the respiration of or obstruct the air passage of.; "The foul air was slowly suffocating the children" |
| ~ tie up | restrain from moving or operating normally.; "Traffic is tied up for miles around the bridge where the accident occurred" |
| ~ dam, dam up | obstruct with, or as if with, a dam.; "dam the gorges of the Yangtse River" |
| ~ block out, screen | prevent from entering.; "block out the strong sunlight" |
| ~ earth up, land up | block with earth, as after a landslide. |
| ~ barricade, block, block up, bar, block off, blockade, stop | render unsuitable for passage.; "block the way"; "barricade the streets"; "stop the busy road" |
| ~ clog, clog up, congest, choke off, foul, back up, choke | become or cause to become obstructed.; "The leaves clog our drains in the Fall"; "The water pipe is backed up" |
| ~ hinder, impede | be a hindrance or obstacle to.; "She is impeding the progress of our project" |
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