Devices and smart home
UEFI
Abbreviation for Unified Extensible Firmware Interface
In short and in plain language
UEFI is the basic software of a modern computer.
It starts when you switch on. That is before the operating system.
It follows older basic software. It offers things like a protected start.
In its settings you can choose the security chip. You can also set the start order there.
Definition
UEFI is the basic software of modern computers that starts before the operating system. It is the successor to the BIOS and offers features such as a protected system start. Its settings control things like the security chip and the boot order.