Definitions of OS [ˈɒs ə]

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Definition of 'OS'

Random House Webster's College Dictionary

1. (n.) os
a bone.

2. (n.) os
a mouth or orifice of the body.

3.  OS
Old Saxon.

4.  OS
Computers. operating system.

5.  Os
osmium.

Definition of 'OS'

Princeton's WordNet

1. (noun) os
a mouth or mouthlike opening

2. (noun) osmium, Os, atomic number 76
a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known

3. (noun) operating system, OS
(computer science) software that controls the execution of computer programs and may provide various services

4. (noun) oculus sinister, OS
the left eye

5. (noun) bone, os
rigid connective tissue that makes up the skeleton of vertebrates

Definitions of 'OS'

The New Hacker's Dictionary

1. OS
1. [Operating System] n. An abbreviation heavily used in email, occasionally in speech.

2. n. obs. On ITS, an output spy. See OS and JEDGAR in Appendix A.