1. The action or process of depleting or reducing something, especially a natural resource, to a dangerously low level
The depletion of fossil fuels is a major environmental concern.
A depleção de combustíveis fósseis é uma preocupação ambiental importante.
2. A reduction in the number or quantity of something
Depletion of the ozone layer has been a focus of international environmental policy.
A depleção da camada de ozônio tem sido foco da política ambiental internacional.
3. In accounting, the reduction in value of a natural resource as it is extracted or used
The company must account for depletion of its mineral reserves.
A empresa deve contabilizar a depleção de suas reservas minerais.