The noun proliferation means rapid growth or increase in numbers of something.

Synonyms are expansion, spread, reproduction, or spreading.

The word origins from French (1859) prolifération meaning “formation or development of cells”, from prolifère meaning “producing offspring”. It comes from Latin proles meaning “offspring” plus ferre meaning “to bear, carry”.

It is better to limit the proliferation of dangerous weapons and improve governmental efficiency.

These past few years have seen the proliferation of TV channels.

A growing proliferation of mobile television proves that people want to be entertained on the go.