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Intentional generation of interfering signals by powerful transmitters as a countermeasure intended to block a communication or radar system or to impair its effectiveness appreciably. For example, radio broadcasts or radio messages can be jammed by beaming a more powerful signal on the same frequency at the area in which reception is to be impaired, using carefully selected noise modulation to give maximum impairment of intelligibility of reception. See also Electronic warfare.

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(JYACC Application Manager) An application development system for client/server environments from Prolifics, New York (www.jyacc.com), a JYACC company. It supports Windows, Mac and Motif clients and most Unix servers and VMS. It supports over 20 databases and includes its own database (JDB) for prototyping. JAM/CASE allows CASE information to be moved into JAM. JAM/TPi integrates JAM with the Tuxedo and Encina TP monitors.

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A thick mixture of fruit, sugar (and sometimes pectin) that is cooked until the pieces of fruit are very soft and almost formless. It is used as a bread spread, a filling for pastries and cookies and an ingredient for various desserts. See also conserve; jelly; preserves.

verb

To fill to excess by compressing or squeezing tightly: cram, crowd, load, mob, pack, stuff. Informal jam-pack. See full/empty/capacity, tighten/loosen.

noun

1. A cessation of normal activity, caused by an accident or strike, for example: gridlock, immobilization, stoppage, tie-up. See continue/stop/pause.
2. A difficult, often embarrassing situation or condition: box¹, corner, deep water, difficulty, dilemma, Dutch, fix, hole, hot spot, hot water, plight¹, predicament, quagmire, scrape, soup, trouble. Informal bind, pickle, spot. See easy/hard.

n

Definition: troublesome situation
Antonyms: benefit, boon

The deliberate radiation, reradiation, or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices, equipment, or systems.

See the Introduction, Abbreviations and Pronunciation for further details.

Quantity	Energy (calories)	Carbohydrates (grams)	Protein (grams)	Cholesterol (milligrams)	Weight (grams)	Fat (grams)	Saturated Fat (grams)
1 tbsp	55	14	0	0	20	0	0

See barrage jamming; electronic attack; electromagnetic jamming; selective jamming; spot jamming.

IN BRIEF: n. - Deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems; Preserve of crushed fruit; A dense crowd of people; Informal terms for a difficult situation;

Tutor's tip: The elderly usher was pushed up against the door "jamb" (door post) as the shrieking fans tried to "jam" (a mass of people causing a blockage) into the concert hall.

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Electronic or mechanical interference that may disrupt the display of aircraft on radar or the transmission or reception of radio communication or radio navigation signals. Radar, communications equipment, and navigational aids can be jammed. Jamming is a major activity in electronic warfare.

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noun
noun, Austral

Affected manners; self-importance; esp. in phr. to lay (or put) on jam. (1882 —) .
D. Stivens Sadie put a bit of jam on when she talked, but not too much (1951).

[From the notion of jam being a luxury foodstuff.]

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For a list of words related to jam, see:

• Condiments
• Performance, Airplay, and the Recording Industry - jam: jam session; (vb) improvise with other musicians
• Baseball - jam: (vb) to throw a pitch in on the batter’s hands, or (n) when a pitcher is in trouble with runners on base
• Basketball
• Fusses and Troubles

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See words rhyming with "jammer."

  See crossword solutions for the clue Jam.

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Dansk (Danish)
1.
v. tr. - proppe, mase, klemme, blokere, slå bremserne i, forstyrre med støjsender
v. intr. - mase sammen, sidde fast, gå i spænd, komme i klemme
n. - blokering, ophobning, trafikprop, trafikknude

idioms:

• in a jam    være i knibe, komme i knibe
• jam session    optræden uden at have øvet sammen forinden

2.
n. - syltetøj, marmelade, fornøjelse
v. tr. - at spille sammen med andre uden at det er planlagt

idioms:

• jam jar    syltetøjsglas, syltetøjskrukke

Nederlands (Dutch)
jam, opstopping, storing (radio), jamsessie, in-/ samen-/ volproppen, vastlopen, vastzitten, improviserend samenspelen (muziek), stremmen, storen (radio), confituur

Français (French)
1.
v. tr. - serrer, comprimer, écraser, coincer, bloquer (un frein), enrayer (un fusil, une machine), (Radio) brouiller, (Télécom) encombrer (la ligne), encombrer, fourrer (qch) en forçant, tasser, entasser (dans), encombrer (une rue, un couloir), embouteiller, obstruer
v. intr. - s'entasser (dans), se bloquer, s'enrayer (un fusil), se coincer (une porte, un levier), (Mus) faire un b¯uf
n. - encombrement, embouteillage, impasse, situation difficile

idioms:

• in a jam    (être) dans une situation difficile/embarrassante
• jam session    jam-session, b¯uf

2.
n. - confiture, gelée
v. tr. - faire de la confiture de fruits

idioms:

• jam jar    pot de confiture

Deutsch (German)
1.
v. - blockieren, stopfen, einklemmen, sich verklemmen, klemmen
n. - Stau, Patsche, Drücken, Klemme, Gedränge

idioms:

• in a jam    in der Klemme stecken
• jam session    (Jazz) Jam session (improvisiertes Spielen einer Jazzband)

2.
n. - Marmelade, Konfitüre
v. - mit Marmelade bestreichen, zu Konfitüre verarbeiten

idioms:

• jam jar    Marmeladenglas

Ελληνική (Greek)
n. - συνωστισμός, συμφόρηση, μποτιλιάρισμα, εμπλοκή (κν. φρακάρισμα, στρίμωγμα), (μαγειρ.) μαρμελάδα
v. - στριμώχνω, σφηνώνω, κολλάω, φρακάρω, παθαίνω εμπλοκή, (τεχν.) παρεμβάλλω παράσιτα εκπέμποντας στο ίδιο μήκος κύματος

idioms:

• in a jam    σε δύσκολη θέση
• jam jar    βάζο γλυκού ή μαρμελάδας, αυτοκίνητο
• jam session    (μουσ.) αυτοσχεδιασμοί ορχήστρας τζαζ

Italiano (Italian)
intralciare, grippare, bloccarsi, marmellata, ingorgo

idioms:

• in a jam    nei pasticci
• jam jar    barattolo per marmellata
• jam session    jam session (quando musicisti di jazz suonano improvvisando)

Português (Portuguese)
n. - aperto (m), geléia (f) (Culin.)
v. - apertar, forçar, emperrar (Mec.)

idioms:

• in a jam    num congestionamento (tráfego), numa confusão
• jam jar    pote (m) de geléia
• jam session    ensaio (m) musical

Русский (Russian)
джем, сжатие, защемление, "пробка", сжимать, защемлять, загромождать, втискивать, варить варенье, импровизация в джазе

idioms:

• in a jam    в тяжелой ситуации
• jam jar    банка для варенья
• jam session    исполнение джазом импровизаций и экспромтов

Español (Spanish)
1.
v. tr. - detener, estorbar, obstaculizar, apretar, estrujar, apiñar, apretujar, llenar por completo, machucar, magullar
v. intr. - atrancarse, atascarse, obstruirse, agolparse, apiñarse, atorarse, fijarse, quedar acuñado, (mús.) participar en una sesión de música de jazz
n. - atasco, congestión, embotellamiento, estrujadura, estrujamiento, apretura, apiñadura, machucadura, machucamiento, atoramiento, aprieto, lío, embrollo, enredo

idioms:

• in a jam    estar en un aprieto
• jam session    sesión de jazz improvisado

2.
n. - confitura, mermelada, delicia, deleite, algo delicioso
v. tr. - cubrir de mermelada, hacer confitura o mermelada

idioms:

• jam jar    pote de mermelada, (jerga) un auto

Svenska (Swedish)
n. - trängsel, anhopning, stockning, blockering, stopp, knipa, sylt
v. - stoppa, pressa, fylla, trängas på, blockera, trycka hårt på, fastna

中文（简体）(Chinese (Simplified))
1. 塞进, 把...塞满, 挤进, 使挤满, 塞紧, 堵塞, 挤满, 卡住, 不能动弹, 拥挤, 轧住, 拥挤的人群

idioms:

• in a jam    处于困境
• jam jar    果酱罐
• jam session    摇滚爵士音乐的即席演奏会

2. 果酱

中文（繁體）(Chinese (Traditional))
1.
n. - 果醬

2.
v. tr. - 塞進, 把...塞滿, 擠進, 使擠滿
v. intr. - 塞緊, 堵塞, 擠滿, 卡住, 不能動彈
n. - 擁擠, 軋住, 堵塞, 擁擠的人群

idioms:

• in a jam    處於困境
• jam jar    果醬罐
• jam session    搖滾爵士音樂的即席演奏會

한국어 (Korean)
1.
v. tr. - 꽉 채우다, 밀어넣다, 막다
v. intr. - 꽉 채워지다, 서로 밀치다, 움직이지 않다
n. - 곤란, 서로 밀침, 혼잡

idioms:

• in a jam    난처한 상황에 있는

2.
n. - 잼, 유쾌한 일
v. tr. - 잼을 만들다

日本語 (Japanese)
n. - ジャム, 混雑, 雑踏, 困難
v. - 押し込む, ふさぐ, 動かなくなる, ぐっと押す, 妨害する

idioms:

• in a jam    窮地に陥る
• jam jar    ジャムの瓶
• jam session    ジャムセッション

العربيه (Arabic)
‏(الاسم) ضغط, تشويش, ازدحام (فعل) كبس او ضغط شيئا في مكان ضيق, ازدحم, شوش‏

עברית (Hebrew)
v. tr. - ‮מילא, דחס, דחק, לחץ, נתקע‬
v. intr. - ‮נדחס, נדחק, נעצר, נתקע, נתקע בלשונו (גמגם)‬
n. - ‮דוחק, צפיפות, מעצור, תקלה‬
n. - ‮ריבה, ממרחת, מרקחת, משהו קל ונעים‬

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