os
noun
a bone.
os
1 American
[os]
/ ɒs /
noun
-
ossa
plural
os
2
American
[os]
/ ɒs /
noun
-
ora
plural
os
3
American
[ohs]
/ oʊs /
noun
-
osar
plural
Os
4
American
OS
5
American
o/s
6
American
-
(of the calendar) Old Style.
-
out of stock.
-
(in banking) outstanding.
O/S
7
American
O.S.
8
American
Or
o.s.
abbreviation
O.S.
9
American
OS
1
British
abbreviation
-
Old School
-
Old Style (method of reckoning dates)
-
Ordinary Seaman
-
(in Britain) Ordnance Survey
-
outsize
-
Old Saxon (language)
o.s.
2
British
abbreviation
-
out of stock
-
banking outstanding
Os
3
British
symbol
os
4
British
/ ɒs /
noun
os
5
British
/ ɒs /
noun
os
6
British
/ əʊs /
noun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of os1
First recorded in 1540–50; from Latin os (inflectional stem oss- ) “bone”
Origin of os2
First recorded in 1730–40; from Latin ōs (inflectional stem ōr- ) “mouth”
Origin of os3
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”
Origin of O.S.8
From Latin oculus sinister
Vocabulary lists containing os
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
A new Longevity Preparedness Index from John Hancock and MIT AgeLab os based on a survey of over 1,300 adults and focused on eight areas such as finance, home, health and community.
From MarketWatch ● Dec. 12, 2025
She first broke through with 2016’s “Remonta,” an album she recorded with her former band Liniker e os Caramelows.
From Los Angeles Times ● Oct. 8, 2025
Ambos os programas são “fundamentais para entender a expansão agrícola no Brasil e as emissões de carbono do desmatamento na Amazônia,” diz Douglas Morton, especialista em sensoriamento remoto do Goddard Space Flight Center da NASA.
From Science Magazine ● May 26, 2022
Hours later, Kelly posts bail and os released from jail in Chicago.
From Seattle Times ● Aug. 18, 2021
You could talk to him about os and argos, suet and grease, croteys, fewmets and fiants, but he only looked polite.
From "The Once and Future King" by T. H. White
In 1988, he founded Luaka Bop, a record label whose influential compilations have introduced American audiences to lesser-known classics of world pop and psychedelia, such as Brazil’s Os Mutantes.
From The Wall Street Journal ● Oct. 9, 2026
"The Dutch experience in my opinion offers a warning for Canada," Os cautioned.
From BBC ● May 15, 2026
As a show of gratitude to the girls and the gays, Os transforms from “Belladona” to Primadonna in vogue-ready house bangers like “Slay,” “Problemática,” and “Boom In Your Face.”
From Los Angeles Times ● Mar. 20, 2026
On the personal side, Os is also relishing her relationship with Peso Pluma.
From Los Angeles Times ● Mar. 20, 2026
The Gs in her name looked like nibbled Os.
From "Inkheart" by Cornelia Funke
Each registered user needs their own iPhone or iPad running the latest OS, so it wouldn’t work with a split iOS-Android household like mine.
From The Wall Street Journal ● Oct. 13, 2026
Apple is also rolling out its latest Apple Intelligence updates through its iOS 27 and Mac OS 27 upgrades.
From MarketWatch ● Sep. 22, 2026
He was sitting in front of an aerial photograph of dry land projected onto a big screen at the OS headquarters in the port city of Southampton, southern England.
From Barron's ● Aug. 12, 2026
The prototype, running a proprietary OS with xAI technology, aligns with Musk’s “everything app” philosophy for his ventures.
From The Wall Street Journal ● Jul. 1, 2026
"Right. Well, the thing is, Pathfinder has an OS update process. So we can change the software to anything we want."
From "The Martian" by Andy Weir
O/S voice: Please can you just say it one more time?
From Washington Post ● Jul. 22, 2022
O/S voice: Can you just say it one more time?
From Washington Post ● Jul. 22, 2022
Photo courtesy of John Luke Venables I’ve been using Chrome O/S since the Chromium project was in beta, when I tested out the CR-48 for the Chromebook pilot testing program.
From Forbes ● May 6, 2013
One of the issues pointed to with Chrome O/S is that you have no control over your local data, because you are using a “glorified browser,” but this is not the case.
From Forbes ● May 6, 2013
Then it stealths itself into all V-RAM applications and spreads outside the O/S.
From Terminal Compromise: computer terrorism: when privacy and freedom are the victims: a novel by Winn Schwartau
To the chagrin of the search committee, word has leaked out that Criswell favored O.S.
From Time Magazine Archive
Result: when French police once got a lead into the O.S., it swiftly collapsed.
From Time Magazine Archive
O.S., while Arber dates it "14/24 June," which is manifestly incorrect.
From The Mayflower and Her Log; July 15, 1620-May 6, 1621 — Volume 6 by Azel Ames
All urbanity, the O.S. took down the receiver, and was heard introducing himself to the F.O.O. by his official designation, as though high office alone could excuse such a liberty.
From Notes of a Camp-Follower on the Western Front by E. W. (Ernest William) Hornung
Rebuking himself for squeamishness, the station-agent returned to his office, caught an O.S. from the wire, took some general instructions, and went out to look at the weather.
From Success A Novel by Samuel Hopkins Adams
When dealing with fluids other than serum the diluent is usually distilled water; whilst if the original substance is a solid the instructions would read: 1 gram o.s.
From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by J. W. H. (John William Henry) Eyre
He was courteously received on January 26 o.s., and was granted an audience by the House of Commons, but the decision had already been taken and his efforts were unavailing.
From History of Holland by George Edmundson
"WOW rita ora really ate this look up i am fully obsessed with it!!" wrote one fan on Twitter.
From Salon ● May 2, 2023
Is the museum presenting the history of cinema ora history of cinema?
From Los Angeles Times ● Sep. 7, 2021
“Kia ora from New Zealand,” chirps John Palethorpe.
From The Guardian ● Dec. 11, 2019
The party was able to push ahead with policies to foster the Maori language and a strategy to deliver services to Maori people called whanau ora, after the native word for family.
From BusinessWeek ● Nov. 29, 2011
Some of us may, indeed, have first got acquainted with them in Dante's beautiful lines:— Nell' ora che comincia i tristi lai La Rondinella presso alia mattina ...
From Essays in the Study of Folk-Songs (1886) by Countess Evelyn Martinengo-Cesaresco
The osar are similar to the kames of Scotland and the eschars of Ireland.
From The Gutenberg Webster's Unabridged Dictionary Section M, N, and O by Project Gutenberg
An I.N.S. photographer found McCarthy propped up in bed in blue pajamas, swathed in bandages from his tuberositas deltoidea to his ossa metacarpalia.
From Time Magazine Archive
The angle of union of the ossa pubis in the male is from sixty to eighty degrees, whereas, in the female it is ninety degrees.
From Beauty Illustrated Chiefly by an Analysis and Classificatin of Beauty in Woman by Alexander Walker
“The baas is dead,” cried the Gaika; “mij ossa es dood, und ek is dood.”
From The Golden Rock by Ernest Glanville
We know him as St Bede, the Venerable Bede, as he has been called from the epithet inscribed on his tomb in Durham Cathedral, which bears the words Hac sunt in fossa Bedæ Venerabilis ossa.
From Our Catholic Heritage in English Literature of Pre-Conquest Days by Emily Hickey
—This locution is commonly used in some parts of the United Kingdom, to describe what is expressed by the Latin proverb: "Sero venientibus ossa."
From Notes and Queries, Vol. IV, Number 89, July 12, 1851 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Geneologists, etc. by Various
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