computer firmware that directs many basic functions of the operating system, as booting and keyboard control.

Origin of BIOS

B(asic) I(nput)/O(utput) S(ystem)



noun, plural bi·os.


biological: a bio control service using praying mantises to reduce the population of garden pests.

Origin of bio

1945–50; by shortening; as adj., independent use of bio-, taken as a free form Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bios

Contemporary Examples of bios

Historical Examples of bios

  • This Bios had hardly been twelve months on the boards as yet!

    The Prime Minister

    Anthony Trollope

  • "Bios be d––––," said Sexty, uttering a string of heavy imprecations.

    The Prime Minister

    Anthony Trollope

  • Should he run one further great chance with Bios,—and if so, by whose assistance?

    The Prime Minister

    Anthony Trollope

  • It was the same Bios whose nature and drift and ways and methods and aspects engaged them all.

    Ann Veronica

    H. G. Wells

British Dictionary definitions for bios


noun plural bios

short for biography
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bios



short for biography, attested from 1961.

Online Etymology Dictionary, © 2010 Douglas Harper