1. (n.) The act of propagating; continuance or multiplication of the kind by generation or successive production; as, the propagation of animals or plants.

2. (n.) The spreading abroad, or extension, of anything; diffusion; dissemination; as, the propagation of sound; the propagation of the gospel.

airing attenuation bandying begetting book breeding broadcast broadcasting bruiting bruiting about circulation circumfusion crossbreeding diffraction diffusion dilution dispensation dispersal dispersion display dissemination dissipation dissogeny distribution divergence endogamy engenderment evaporation evulgation expansion fragmentation generation inbreeding issuance issue linebreeding multiplication outbreeding peppering periodical printing procreation proliferation promulgation publication publishing radiation scattering scatterment shotgun pattern sowing spattering splay spread spreading spreading abroad sprinkling strewing telecasting ventilation volatilization xenogamy