Os definitions

ōs
Old Saxon.
abbreviation
97
2
noun
97
3
Osmium.
symbol
97
3
A bone.
noun
94
0
Old series.
abbreviation
94
1
A mouth; opening.
noun
91
1
Old Style.
abbreviation
91
1
Operating system.
abbreviation
88
1
Ordinary Seaman.
abbreviation
85
1
Out of stock.
abbreviation
82
2
Ordinary seaman.
abbreviation
52
0
Old Style.
abbreviation
52
1
Operating system.
abbreviation
52
1
A mouth or an opening.
noun
49
1
A bone.
noun
46
0
A mouth or an opening.
noun
13
0
A bone.
noun
10
0
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.

noun
6
0
(rare, medicine) Bone.
noun
2
0
(rare) A mouth; an opening.
noun
2
0
In particular, either end of the cervix, internal (to the uterus) or external (to the vagina).
noun
2
0
An osar or esker.
noun
2
0
Abbreviation of Old Saxon.
abbreviation
2
0
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.
1
0
(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.
0
0

Origin of os

From neuter Latin word os with the genitive oris (meaning "mouth").