| jam1 (dʒæm) | |
| —vb (often foll by on) , jams, jamming, jammed | |
| 1. | (tr) to cram or wedge into or against something: to jam paper into an incinerator |
| 2. | (tr) to crowd or pack: cars jammed the roads |
| 3. | to make or become stuck or locked: the switch has jammed |
| 4. | to activate suddenly (esp in the phrase jam on the brakes) |
| 5. | (tr) to block; congest: to jam the drain with rubbish |
| 6. | (tr) to crush, bruise, or squeeze; smash |
| 7. | radio to prevent the clear reception of (radio communications or radar signals) by transmitting other signals on the same frequency |
| 8. | slang (intr) to play in a jam session |
| —n | |
| 9. | a crowd or congestion in a confined space: a traffic jam |
| 10. | the act of jamming or the state of being jammed |
| 11. | informal a difficult situation; predicament: to help a friend out of a jam |
| 12. | See jam session |
| [C18: probably of imitative origin; compare | |
| 'jammer1 | |
| —n | |
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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| jammer | |
noun | |
| a transmitter used to broadcast electronic jamming |