A gradual decrease or decline; in some contexts, a reduction in rate or amount (the opposite of progression).
From Latin degr 'down' + gredi 'to go/step,' making degression 'stepping down.' The noun form describes the state or process of declining.
Tax degression systems reduce rates for lower incomes—the opposite of progressive taxation—though it's rarely used because 'regression' or 'reduction' are clearer in modern English.
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