1. The quality of being effective or productive in relation to its cost; achieving good results without excessive spending
The cost-effectiveness of solar panels has improved significantly over the past decade.
A custo-efetividade dos painéis solares melhorou significativamente na última década.
2. In healthcare and economics, the measure of how efficiently resources are used to achieve desired outcomes
The government evaluated the cost-effectiveness of different treatment options.
O governo avaliou a custo-efetividade de diferentes opções de tratamento.