os

¹

[ os ]

noun

, plural os·sa [os, -, uh].

1. Anatomy, Zoology. a bone.

O.S.

²

or o.s.

abbreviation for

1. (in prescriptions) the left eye.

os

³

[ os ]

noun

, plural o·ra [awr, -, uh, ohr, -, uh].

1. Anatomy, Zoology. a mouth or orifice of the body.

O.S.

⁴

abbreviation for

1. Old Saxon ( def ). Also OS
2. (of the calendar) Old Style ( def 2 ).
3. ordinary seaman. Also o.s.

os

⁵

[ ohs ]

noun

, plural o·sar [oh, -sahr].

1. Geology. an esker, especially when of great length.

Os

⁶

1. Symbol, Chemistry. osmium.

OS

⁷

abbreviation for

1. Old Saxon ( def ). Also O.S.
2. Computers. operating system ( def ).

o/s

⁸

1. (of the calendar) Old Style.
2. out of stock.
3. (in banking) outstanding.

O/S

⁹

1. (of the calendar) Old Style.

o.s.

¹

abbreviation for

1. out of stock
2. banking outstanding

os

²

/ əʊs /

noun

1. another name for esker

os

³

/ ɒs /

noun

1. anatomy zoology a mouth or mouthlike part or opening

Os

⁴

the chemical symbol for

1. osmium

OS

⁵

abbreviation for

1. Old School
2. Old Style (method of reckoning dates)
3. Ordinary Seaman
4. (in Britain) Ordnance Survey
5. outsize
6. Old Saxon (language)

os

⁶

/ ɒs /

noun

1. anatomy the technical name for bone

Word History and Origins

Origin of os¹

First recorded in 1540–50; from Latin os (inflectional stem oss- ) “bone”

Origin of os²

From Latin oculus sinister

Origin of os³

First recorded in 1730–40; from Latin ōs (inflectional stem ōr- ) “mouth”

Origin of os⁴

First recorded in 1840–50 as osar (plural); from Swedish ås (plural åsar ) “ridge (of a hill),” from Old Norse áss “thick pole or main beam; rocky ridge”

Word History and Origins

Origin of os¹

C19 osar (pl), from Swedish ås (sing) ridge

Origin of os²

C18: from Latin

Origin of os³

C16: from Latin: bone; compare Greek osteon

Example Sentences

An operating system called /e/OS might have been the answer Mr Mirza was looking for.

From BBC

Catherine points to potential areas that could have been missed on her large OS map covering the kitchen table.

From BBC

“If Apple integrates OpenAI at the OS level, then Apple devices will be banned at my companies,” Musk wrote on X. “That is an unacceptable security violation.”

From Los Angeles Times

OS is well known for its travel and walking maps, but is also responsible for maintaining Great Britain's national geographic database.

From Science Daily

The Meta spokesperson declined to address the roadmap or whether the OS that Box's team was building would be in the first generation AR glasses.

From Reuters