Chain propagation in a chemical reaction mechanismCrack propagation, the growth of a crack during the fracture of materialsPropaganda, non-objective information used to further an agendaReproduction, and other forms of multiplication or increasePlant propagation, the production of more plantsPropagation of schema, in artificial reproductionSoftware propagation, the distribution of free softwareWave propagation, the motion of a waveRadio propagation, the application of wave propagation to radio communicationsIn musicPropagation (album)"Propagation", a song by Lower Dens from the album Nootropicsreference