AskDefine | Define OS

Dictionary Definition



1 a mouth or mouthlike opening
2 a hard brittle blue-gray or blue-black metallic element that is one of the platinum metals; the heaviest metal known [syn: osmium, atomic number 76]
3 (computer science) software that controls the execution of computer programs and may provide various services [syn: operating system]
4 the left eye [syn: oculus sinister]
5 rigid connective tissue that makes up the skeleton of vertebrates [syn: bone] [also: ossa (pl), osar (pl), ora (pl)]

User Contributed Dictionary


  1. Ordnance Survey
  2. operating system
  3. oculus sinister (OS) - left eye
  4. outsize




Extensive Definition

The os is the external orifice of the uterus; it is the opening at the tip of the cervix which separates the uterus from the vagina.
Os may also refer to:
OS may refer to:
  • Oculus Sinister (O.S.)-latin for left eye- used commonly by physicians and pharmacists
  • Open Source software
  • Operating system, the software that manages the hardware and software of a computer
  • Ogawa Seiki (aka O.S. Engine or O.S.), a Japanese manufacturer of model airplane engines
  • Ordnance Survey (OS), the national mapping agency for Great Britain
  • Open Seat, (aka Open Sabadell Atlantico or OS), a tennis tournament in Barecelona, Spain
  • Old Style (OS), a term used in English language historical studies to indicate that a date conforms to the Julian calendar
  • The IATA designator for Austrian Airlines
OS in Catalan: Os (desambiguació)
OS in Czech: OS
OS in German: OS
OS in Esperanto: Os
OS in French: OS
OS in Korean: OS
OS in Italian: OS
OS in Dutch: OS
OS in Japanese: OS
OS in Norwegian: Os
OS in Norwegian Nynorsk: Os
OS in Polish: Os
OS in Portuguese: OS
OS in Kölsch: OS (Watt ėßß datt?)
OS in Slovak: Os
OS in Slovenian: OS
OS in Finnish: Os
OS in Chinese: OS
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