| jammer | (noun) a transmitter used to broadcast electronic jamming | - |
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| jammies | (noun) (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers | Synonyms: pajama, pj's, pyjama |
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| jamming | (noun) deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems | Synonyms: electronic jamming, jam |
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| katzenjammer | (noun) loud confused noise from many sources | Synonyms: brouhaha, hubbub, uproar |
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| (noun) disagreeable aftereffects from the use of drugs (especially alcohol) | Synonyms: hangover |
| windjammer | (noun) a large sailing ship | - |
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