noun. (computer science) coded instructions that are stored permanently in read-only memory.
1. Noun, singular or mass You can configure your default boot drives from the firmware interface, or you can choose a temporary boot device when you turn on your computer. 2. Adjective The splash screen displayed when you power on your PC is part of a firmware interface installed on your motherboard, and it contains instructions for booting into your BIOS utility or choosing a temporary boot device. 3. Verb, non-3rd person singular present Update your modem's firmware by accessing its control panel through a web browser.