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The Collaborative International Dictionary of English v.0.48 (gcide)

Propagation \Prop`a*ga"tion\, n. [L. propagatio: cf. F.
propagation.]
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1. The act of propagating; continuance or multiplication of
the kind by generation or successive production; as, the
propagation of animals or plants.
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There is not in nature any spontaneous generation,
but all come by propagation. --Ray.
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2. The spreading abroad, or extension, of anything;
diffusion; dissemination; as, the propagation of sound;
the propagation of the gospel. --Bacon.
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