- The definition of an os is a mouth or hole.
An example of an os is a shirt opening for a head to go through.
Origin of osSwedish ås, ridge, plural åsar ; from Old Norse āss ; from Indo-European base an unverified form omso-, shoulder from source Classical Greek ōmos, Classical Latin umerus, shoulder
Origin of o.s.Classical Latin oculus sinister left eye
Origin of osLatin ōs, mouth; see ōs- in Indo-European roots.
Origin of osLatin, bone; see ost- in Indo-European roots.
Origin of osSwedish ås, ridge, from Old Norse āss.
- or O/S Old Style
- operating system
- ordinary seaman
- Latin oculus sinister (left eye)
- old series
- or o/s out of stock
- (rare, medicine) Bone.
Only used by doctors and surgeons when practising. Not used by medical laymen.
From neuter Latin word os with the genitive oris (meaning "mouth").
- -mab is the base suffix common to all monoclonal antibodies. (See that entry for full paradigm.)
From Latin os (“bone”)
- Abbreviation of Old Saxon.
o's - Computer Definition
The master software program that controls the allocation and usage of all internal resources (e.g., memory, queuing, input/output, central processing unit [CPU], time, disk space, and transmission and reception processes) and, thereby, enables and controls the operation of the entire computer system.The OS forms the foundation for application software that performs end-user tasks such as word processing and mathematical calculation. An OS is largely software, although there are firmware components. See also firmware, program, and software.
(Operating System) The master control program in a computer or mobile device. The O-S acronym has been part of the names of various operating systems. Microsoft used DOS for many years in the PC, and Apple used OS 8, OS 9 and OS X in the Mac. For the major functions operating systems perform, see operating system. Some of the operating systems in this encyclopedia that have O-S in their name are TOS, DOS, PC-DOS, MS-DOS, DR-DOS, Mac OS, Mac OS X, iOS, OS/390 and OS/400.
Variant of o
nounpl. O's, o's
- the fifteenth letter of the English alphabet: from the Greek omega and omicron, both borrowed from the Phoenician
- any of the speech sounds that this letter represents, as, in English, the vowel (ō) of boat, (ä) of hot, or (ô) of wrong
- a type or impression for o or O
- the fifteenth in a sequence or group
- an object shaped like
- of o or O
- fifteenth in a sequence or group
- shaped like ; circular or oval in shape