BIOS

play
noun \ ˈbī-ˌōs \

Definition of BIOS

plural BIOSes
computers
:a software element of a computer operating system that allows the CPU to communicate with connected input and output devices (such as a keyboard or a monitor)
  • Your PC contains several BIOSes—the video BIOS that interfaces your CPU and video card, for example—but the most fundamental is the system BIOS.
  • —Neil Randall

Origin and Etymology of bios

Basic Input/Output System


Medical Dictionary

bios

play
noun bi·os \ ˈbī-ˌäs \

medical Definition of bios

:a mixture of vitamins of the B complex essential for the optimum growth of some yeasts

Learn More about bios


Seen and Heard

What made you want to look up BIOS? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

agreeable, attractive, or delicious

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!