1. An important or distinctive characteristic that is central to the identity or function of something
The key feature of this smartphone is its advanced camera system.
A característica principal deste smartphone é seu sistema de câmera avançado.
2. A prominent or essential aspect that defines or distinguishes a product, service, or concept
One key feature of the new software is its user-friendly interface.
Uma característica principal do novo software é sua interface amigável.