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
“It’s very beautiful to know that you have a partner that knows what you go through and that can give you advice from his experiences as well,” Os says.
From Los Angeles Times ● Mar. 20, 2026
If the photo made the grade, we cut it out, glued it on a piece of lined paper, and reinforced the holes in the paper with adhesive Os so the page wouldn’t tear out.
From "The Glass Castle" by Jeannette Walls
Stagwell introduced Stagwell Media, a media agency building on Assembly and using the company’s agentic technology platform, Machine OS.
From The Wall Street Journal ● Oct. 7, 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
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
"We don't know if he's still alive," his aunt Francesca told the BBC World Service's OS programme.
From BBC ● Jan. 2, 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: Can you just say it one more time?
From Washington Post ● Jul. 22, 2022
O/S voice: Just do one take with “heinous” and without the “wonderful people.”
From Washington Post ● Jul. 22, 2022
O/S voice: Please 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
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
Result: when French police once got a lead into the O.S., it swiftly collapsed.
From Time Magazine Archive
To the chagrin of the search committee, word has leaked out that Criswell favored O.S.
From Time Magazine Archive
The facts are confirmed by the report of the English Ambassador at Valladolid, 17th July 1605, O.S., printed in the Winwood Memorials, vol. ii. p.
From English Travellers of the Renaissance by Clare Howard
It dates from the battle of the Marne, and the story is narrated by our old friend the Rev. O.S.
From With our Fighting Men The story of their faith, courage, endurance in the Great War by William Edward Sellers
After the Reformation the Saint's day was kept on the 10th of March, O.S., as one of the principal fairs of the town, and so continued until a recent period.
From Chronicles of Strathearn by W. B. Macdougall
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
Cobb could be a No. 3 starter for some clubs ora nice back-of-the-rotation pick-up for the Dodgers.
From Los Angeles Times ● Oct. 30, 2021
Kia ora koutou – wherever this finds you around this glorious Commonwealth of ours!
From The Guardian ● Apr. 9, 2018
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
Higher and higher one treble voice goes like the cry of a soul in agonized entreaty: "Maria, Maria, Sancta Maria, Ora, ora pro nobis."
From Marie Gourdon A Romance of the Lower St. Lawrence by Maud Ogilvy
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 baas is dead,” cried the Gaika; “mij ossa es dood, und ek is dood.”
From The Golden Rock by Ernest Glanville
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
—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
Since Michelangelo's great paintings were at Rome the Florentines copied chiefly his statues, devoting themselves principally, as Lanzi says, to ostentatiously showing "magna ossa lacertosque."
From Michelangelo by Romain Rolland
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