diffusion

/di.fy.zjɔ̃/
1.
nounfeminine

broadcasting; airing; transmission (of a radio/TV programme or stream)

La diffusion du match commence à vingt heures sur cette chaîne.

The broadcast of the match starts at 8 PM on this channel.

Synonyms:émission, retransmission, transmission
2.
nounfeminine

distribution; circulation; reach (of a publication, product or information)

Ce magazine a une large diffusion dans toute la France.

This magazine has a wide circulation throughout France.

Synonyms:distribution, circulation, répartition
3.
nounfeminine

physical or chemical process by which particles, heat or substances spread from regions of higher concentration to lower concentration

La diffusion des gaz dans l'air dépend de la température et de la pression.

The diffusion of gases in the air depends on temperature and pressure.

Synonyms:dispersion, propagation