Definitions

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

  • abbreviation Uncle Sam
  • abbreviation Uniform System (of lens aperture)
  • abbreviation United States
  • abbreviation United States highway

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

  • noun The ISO 3166-1 two-letter (alpha-2) code for United States of America.
  • proper noun Abbreviation of United States.
  • adjective American; related to the United States.

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