[ daws, dos ]
/ dɔs, dɒs /

noun Computers.

any of several single-user, command-driven operating systems for personal computers, especially MS DOS.


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Origin of DOS

d(isk) o(perating) s(ystem)

Definition for dos (2 of 5)

Definition for dos (3 of 5)

[ daws, dos, dee-oh-es ]
/ dɔs, dɒs, ˈdiˌoʊˈɛs /

Computers. denial-of-service: DoS protection for web servers.

Definition for dos (4 of 5)

Origin of do

before 900; Middle English, Old English dōn; cognate with Dutch doen, German tun; akin to Latin -dere to put, facere to make, do, Greek tithénai to set, put, Sanskrit dadhāti (he) puts

synonym study for do

3. Do, accomplish, achieve mean to bring some action to a conclusion. Do is the general word: He did a great deal of hard work. Accomplish and achieve both connote successful completion of an undertaking. Accomplish emphasizes attaining a desired goal through effort, skill, and perseverance: to accomplish what one has hoped for. Achieve emphasizes accomplishing something important, excellent, or great: to achieve a major breakthrough.


dew do dew

Definition for dos (5 of 5)

[ doh ]
/ doʊ /

noun, plural dos. Music.

the syllable used for the first tone or keynote of a diatonic scale.
(in the fixed system of solmization) the tone C.Compare sol-fa(def 1), ut.

Origin of do

1745–55; < Italian, inverted variant of ut; see gamut Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for dos

British Dictionary definitions for dos (1 of 5)

/ (dɒs) /

n acronym for trademark computing

disk-operating system, often prefixed, as in MS-DOS and PC-DOS; a computer operating system

British Dictionary definitions for dos (2 of 5)


abbreviation for

Doctor of Optometry
Doctor of Osteopathy

British Dictionary definitions for dos (3 of 5)

/ (duː, unstressed , ) /

verb does, doing, did or done

noun plural dos or do's

Word Origin for do

Old English dōn; related to Old Frisian duān, Old High German tuon, Latin abdere to put away, Greek tithenai to place; see deed, doom

British Dictionary definitions for dos (4 of 5)

/ (dəʊ) /

noun plural dos

a variant spelling of doh 1

British Dictionary definitions for dos (5 of 5)


the internet domain name for

Dominican Republic
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