• Interfering with communications or surveillance:
  • Radio jamming
    Radio jamming
    Radio jamming is the transmission of radio signals that disrupt communications by decreasing the signal to noise ratio. Unintentional jamming occurs when an operator transmits on a busy frequency without first checking whether it is in use, or without being able to hear stations using the frequency...
    
    
  • Radar jamming and deception
    Radar jamming and deception
    Radar jamming and deception is the intentional emission of radio frequency signals to interfere with the operation of a radar by saturating its receiver with noise or false information...
    
    
  • Mobile phone jammer
  • E-mail jamming
    E-mail jamming
    Email jamming is the use of sensitive words in emails to jam the authorities that listen in on them by providing a form of a red herring and an intentional annoyance. It is used by some civil rights activists in an attempt to thwart government spy networks such as ECHELON...
    
    
• Jamming (dance)
  Jamming (dance)
  Jamming in dance culture is a kind of informal show-off during a social dance party. Dancers clear a circle and dancers or dance couples take turns showing their best tricks while the remaining dancers cheer the jammers on...
  
  , cheered show-offs during social dancing
• Jamming (fanzine), a UK music fanzine of the 1970s–80s
• Jamming (physics)
  Jamming (physics)
  Jamming is the physical process by which some materials, such as granular materials, glasses, foams, and other complex fluids, become rigid with increasing density...
  
  , an apparent change of physical state
• Jamming (song)
  Jamming (song)
  "Jamming" is a song by the reggae band Bob Marley & the Wailers from their 1977 album Exodus. The song also appears on the compilation album Legend....
  
  , from Bob Marley's album Exodus
• Culture jamming
  Culture jamming
  Culture jamming, coined in 1984, denotes a tactic used by many anti-consumerist social movements to disrupt or subvert mainstream cultural institutions, including corporate advertising. Guerrilla semiotics and night discourse are sometimes used synonymously with the term culture jamming.Culture...
  
  , criticizing mass media through its own methods
• Jam session
  Jam session
  Jam sessions are often used by musicians to develop new material, find suitable arrangements, or simply as a social gathering and communal practice session. Jam sessions may be based upon existing songs or forms, may be loosely based on an agreed chord progression or chart suggested by one...
  
  , a semi-improvised rock or jazz performance
• A rock climbing technique
  Climbing technique
  A climbing technique is any type or combination of body posture, movement, or hold used in climbing. In this article, several different climbing techniques are listed, and briefly described.-Bridging, or stemming:...
  
  
• Jamming (knot), the tendency of knots to become difficult to untie
• The jamming of machine parts against each other, usually due to insufficient lubrication
  Lubrication
  Lubrication is the process, or technique employed to reduce wear of one or both surfaces in close proximity, and moving relative to each another, by interposing a substance called lubricant between the surfaces to carry or to help carry the load between the opposing surfaces. The interposed...
  
  

See also

• Jammin'
  Jammin'
  Jammin' is a musical comedy show on BBC Radio 2 in the United Kingdom. It is presented by Rowland Rivron, who also plays drums. In addition to Rowland, there are two regulars in the band, and two guests - usually one comedian and one musician. The two regulars are usually Dave Catlin-Birch and...
  
  , musical comedy show
• Jammin
  Jammin
  Jammin was an original reality television series created by Sí TV that documents the attempts of six Latino bands to win a $10,000 cash prize and a Gibson sponsorship. Out of hundreds of bands that submitted entries, only the top fifteen bands, selected by online polling, advanced to the next round...
  
  , reality television series