weakenweak·en /ˈwiːkən/ verb1[intransitiveI, transitiveT]FINANCE if investments, prices, currencies etc weaken, or something weakens them, they begin to fall in valueA combination of low US interest rates and a rising Euro will weaken the dollar.
Work stoppages will cause an alreadyweakening economy to slow further.
London shares weakened, while Frankfurt stocks finished strong.
2[transitiveT] to make something less powerful, successful, or profitableFurther weakened by the recession, the airline filed for bankruptcy.
Many agencies fear that revealing the use of subcontractors may weaken their reputations as full-service shops.