dos

D2O1S1
/duːz/UK/dəʊz/US/doʊz//diː oː ˈɛs/

noun

A denial-of-service attack.

Similar
Foggy Bottomdisk operating systemDepartment of StateUnited States Department of StateState DepartmentState
CommonScrabble 4

Meanings

dos1

noun

alternative do's

  1. pluralplural of do

    With the coming of Monday arrived a new life for David—a curious life full of "don'ts" and "dos." David wondered sometimes why all the pleasant things were "don'ts" and all the unpleasant ones "dos."

    1916, Eleanor H. Porter, chapter VIII, in Just David

dos2

noun

alternative do's

  1. pluralentertainmentplural of do

    In functional harmonic progression, three “Dos” in a row within the Do-Ti test indicate chord changes that can only be this descending third pattern.

    2020, Jennifer Snodgrass, Teaching Music Theory, Oxford University Press, →ISBN, page 212

DOS3

nounDOS (plural DOSes)

plural DOSes

  1. abbreviationinitialismgovernmentInitialism of date of service.
  2. abbreviationinitialismgovernmentInitialism of date of separation.
  3. InternetabbreviationinitialismcomputingInitialism of denial of service.
  4. abbreviationinitialismsciencesInitialism of density of states.
  5. abbreviationinitialismeducationInitialism of director of studies.
  6. abbreviationinitialismcomputingInitialism of disk operating system
  7. abbreviationinitialismemergency servicesInitialism of death on scene.
proper noun
  1. abbreviationacronymhistoricalcomputingAcronym of Disk Operating System, a family of disk-based operating systems.

    Next, using your word processor or the DOS text editor, you can edit your AUTOEXEC.BAT file.

    1993, Kris A. Jamsa, DOS: The Complete Reference, McGraw–Hill Osborne Media
    1 more example

    One way to do that is to turn the PC off and turn it back on again. Then, the PC performs its self-test and boots DOS.

    1993, Doug Lowe, The Only DOS Book You'll Ever Need, Mike Murach & Associates Incorporated, →ISBN, page 95
  2. USabbreviationinitialismgovernmentInitialism of Department of State.

    Synonyms: Foggy Bottom

DoS4

nounDoS (plural DoSs or DoSes)

plural DoSs · plural DoSes · alternative DOS

  1. InternetcomputingA denial-of-service attack.
verbDoS (third-person singular simple present DoSes, present participle DoSing, simple past and past participle DoSed)

present singular third person DoSes · participle present DoSing · participle past DoSed · past DoSed · alternative DOS

  1. InternettransitivecomputingTo commit a denial-of-service attack against.

    In addition to out-of-spec traffic, malicious packets can contain payloads that cause a system to crash. A packet's payload is taken as input into a service. If the input is not properly checked, the application can be DoSed.

    2003, Jack Koziol, Intrusion Detection with Snort, Indianapolis, IN: Sams Publishing, →ISBN, page 15

DoS5

noun
  1. educationA Director of Studies; someone who oversees the scholarly aspects of an institution, including faculty development and curriculum design.

Synonyms & antonyms

More synonyms by meaning

nounan operating system that is on a disk

nounthe federal department in the United States that sets and maintains foreign policies

Similar
Department of StateUnited States Department of StateState DepartmentState
Broader
executive department

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

Translations

Arabic دوس
  • دوسdisk operating system
French DOS
  • DOSdisk operating system
Icelandic diskstýrikerfi
  • diskstýrikerfidisk operating system
Italian DOS
  • DOSdisk operating system

Rhymes & wordplay

Rhymes with dos

All rhymes →

Anagrams

Cite this entry
APA

dos. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/dos

MLA

“dos.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/dos. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “dos,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/dos.

Source: dos on Wiktionary, CC BY-SA 4.0.