Jamming may mean: * Interfering with communications or surveillance: ** Radio jamming ** Radar jamming and deception ** Mobile phone jammer ** Echolocation 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 Marley's album Exodus * Culture jamming, criticizing mass media through its own methods * Jam session, a semi-improvised rock or jazz performance * A rock climbing technique * Jamming (knot), the tendency of knots to become difficult to untie * The jamming of machine parts against each other, usually due to insufficient lubrication. An OSH glossary used in safety and health at work which is, adopted by ILO