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in the PONS Dictionary

propagation [pʀɔpagasjɔ͂] N f

1. propagation (extension):

propagation
propagation d'une épidémie
propagation d'une épidémie
propagation d'un incendie
propagation d'un incendie
propagation PHYS de la lumière, des ondes, du son

2. propagation (diffusion):

propagation d'une idée, nouvelle

3. propagation (reproduction):

propagation d'une espèce