What is the noun form of revert?

What is the noun form of revert? noun. noun. /rɪˈvərʒn/ 1[uncountable, singular] reversion (to something) (formal) the act or process of returning to a former state or condition a reversion to traditional farming methods.

noun. noun. /rɪˈvərʒn/ 1[uncountable, singular] reversion (to something) (formal) the act or process of returning to a former state or condition a reversion to traditional farming methods.