jamjam2 ●●○ verb (jammed, jamming) 1 push hard [transitive always + adverb/preposition]PUSH to push something somewhere using a lot of force, until it can move no further He jammed his foot on the accelerator and the car sped off. A chair had been jammed up against the door.2 machine [intransitive, transitive] (also jam up)BREAKBROKEN if a moving part of something jams, or if you jam it, it no longer works properly because something is preventing it from moving The front roller has jammed on the photocopier.3 block [intransitive, transitive] (also jam up)PREVENT if a lot of people or vehicles jam a place, they fill it so that it is difficult to move syn cram Crowds jammed the entrance to the stadium.jam into They all jammed into the car. → jammed(2)4 music [intransitive] (also jam out)APM to play music in an informal way with other people → jam session5 → jam on the brakes6 → jam somebody’s/the switchboard7 radio [transitive]TCBPREVENT to deliberately prevent broadcasts or other electronic signals from being received, by broadcasting signals on the same wavelength8 → somebody is jamming → jam out→ See Verb table
Examples from the Corpusjam• The third time the clasp jammed.• One pilot reported that his controls had jammed.• Some guys are getting together tonight at Scott's to jam.• Just hold the door open while I jam a wedge under it.• The electronic equipment jams enemy radar signals.• All five boys jammed happily into the back seat.• Mark jams his under a cushion.• Bollards are prone to sudden collapse, and the ropes often jam in the groove behind the capstan during retrieval.• In his desperation to escape, he fumbled the lever and the door jammed partly open.• All-night jam sessions were common in Kansas City jazz clubs of the 1930s.• Kelly poured himself another glass of wine and jammed the cork back into the bottle.• Crowds of supporters jammed the lobby.• The result was the Yosemite that tourists see today, jammed with awe-inspiring plutons with rounded tops and steep, vertical sides.• Matthews used to jam with drummer Carter Beauford and saxophonist LeRoi Moore.• We were jamming with J.D. and Rich last night.• Of course, the newspapers were filled with it, and the docks, railyards, and whorehouses were jammed with soldiers.