/ reɪˈʒiːm; NAmE / noun
1.
a method or system of government, especially one that has not been elected in a fair way :
a fascist / totalitarian / military, etc. regime
an oppressive / brutal regime
2.
a method or system of organizing or managing sth :
Our tax regime is one of the most favourable in Europe.
3.
= regimen :
a dietary regime
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WORD ORIGIN
late 15th cent. (in the sense regimen ): French régime , from Latin regimen rule, from regere to rule. Sense 1 dates from the late 18th cent. (with original reference to the Ancien Régime).