Jamming may mean: * Interfering with communications or surveillance: ** Radio jamming ** Radar jamming and deception ** Mobile phone jammer ** E-mail jamming * Jamming (dance) cheered show-offs during social dancing * Jamming (fanzine) a UK music fanzine of the 1970s–80s * Jamming (physics) an apparent change of physical state * Jamming (song) from Bob Marleys album Exodus * Culture jamming criticizing mass media through its own methods * Jam session a semi-improvised rock or jazz performance * A rock climbing technique * Knot#Releasability the tendency of knots to become difficult to untie * The jamming of machine parts against each other, usually due to insufficient lubrication nl:Jamming