Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of a family of operating systems that use command lines and were originally developed for personal computers made by IBM.

from The Century Dictionary.

  • noun In civil law: Property brought to a husband by his wife, upon marriage. See dotal *property.
  • noun A common-law dower. See dower, 2.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • initialism computing Disk Operating System
  • initialism military Date(s) of service
  • initialism military Date of separation
  • initialism US Department of State
  • initialism sciences Density of states

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an operating system that is on a disk
  • noun the federal department in the United States that sets and maintains foreign policies

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[d(isk) o(perating) s(ystem).]

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