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jam

PRIMARY MEANINGS OF: jam

1	v n	press tightly together or cram a dense crowd of people
2	v n	block passage through deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
3	n	preserve of crushed fruit

FULL DEFINITIONS OF: jam

v press tightly together or cram

Synonyms:: mob, pack, pile, throng

Type of:: crowd, crowd together
to gather together in large numbers

v crowd or pack to capacity

Synonyms:: chock up, cram, jampack, ram, wad

: cram
put something somewhere so that the space is completely filled

Type of:: stuff
cram into a cavity

v push down forcibly

“The driver jammed the brake pedal to the floor”

Type of:: force, push
move with force, "He pushed the table into a corner"

v crush or bruise

“jam a toe”

Synonyms:: crush

Type of:: bruise, contuse
injure the underlying soft tissue or bone of

v get stuck and immobilized

“the mechanism jammed”

Type of:: malfunction, misfunction
fail to function or function improperly

n a dense crowd of people

Synonyms:: crush, press

Types:: snarl-up, traffic jam
a number of vehicles blocking one another until they can scarcely move; gridlock
a traffic jam so bad that no movement is possible

Type of:: crowd
a large number of things or people considered together

n informal terms for a difficult situation

Synonyms:: fix, hole, kettle of fish, mess, muddle, pickle

Types:: dog's breakfast, dog's dinner
a poor job; a mess

Type of:: difficulty
a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome

v block passage through

Synonyms:: block, close up, impede, obstruct, obturate, occlude

Antonyms:: disengage, free
free or remove obstruction from

Types:: show 17 types...; hide 17 types...; block off, blockade
obstruct access to; barricade, barricado
block off with barricades; barricade
prevent access to by barricading; asphyxiate, choke, stifle, suffocate
impair the respiration of or obstruct the air passage of; tie up
restrain from moving or operating normally; dam, dam up
obstruct with, or as if with, a dam; block out, screen
prevent from entering; earth up, land up
block with earth, as after a landslide; bar, barricade, block, block off, block up, blockade, stop
render unsuitable for passage; back up, choke, choke off, clog, clog up, congest, foul
become or cause to become obstructed; gum up
stick together as if with gum; block off, close off, shut off
block off the passage through; shade
protect from light, heat, or view; close
bar access to; crap up
become obstructed or chocked up; block, choke up, lug, stuff
obstruct; silt, silt up
become chocked with silt

Type of:: hinder, impede
be a hindrance or obstacle to

v interfere with or prevent the reception of signals

“Jam the Voice of America”

Synonyms:: block

Types:: show 4 types...; hide 4 types...; barrage jam
jam an entire frequency spectrum; point jam
jam a narrow band of frequencies; spot jam
jam a single frequency; blanket jam
jam a broad spectrum of frequencies to affect all communications in the area except for directional antenna communications

Type of:: break up, cut off, disrupt, interrupt
make a break in

n deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems

Synonyms:: electronic jamming, jamming

Types:: barrage jamming
electronic jamming over a wide range of frequencies simultaneously; selective jamming, spot jamming
electronic jamming of a specific channel or frequency

Type of:: ECM, electronic countermeasures
electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum

n preserve of crushed fruit

Types:: strawberry jam, strawberry preserves
made with strawberries

Type of:: conserve, conserves, preserve, preserves
fruit preserved by cooking with sugar

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