›to become less, worse, or lower in value: Milk production could decline by 15% or more in the late summer months.declining prices/profits/sales/interest ratesEven though interest rates could decline further, they are now near their lowest point.decline sharply/rapidly/dramaticallydecline gradually/steadily/slowlyAmong economists, the widespread view is that the dollar will keep declining.
›to make less profit, or produce less: a declining economy/industry/marketThe plan will reduce profits for the declining commercial fishing industry.