1. A specific area, field, or segment of economy, industry, or activity that has been clearly established or demarcated
The healthcare sector is a well-defined sector of the economy.
O setor de saúde é um setor definido da economia.
2. In computing and data management, a clearly specified portion of disk space or memory allocated for a particular purpose
Each setor definido on the hard drive contains specific data blocks.
Cada setor definido no disco rígido contém blocos de dados específicos.
3. A bounded geographical or administrative region with established boundaries
The military operations were restricted to a defined sector.
As operações militares foram restritas a um setor definido.