os
1 Americannoun
noun
noun
-
(of the calendar) Old Style.
-
out of stock.
-
(in banking) outstanding.
abbreviation
abbreviation
-
Old School
-
Old Style (method of reckoning dates)
-
Ordinary Seaman
-
(in Britain) Ordnance Survey
-
outsize
-
Old Saxon (language)
abbreviation
-
out of stock
-
banking outstanding
symbol
noun
noun
noun
Other Word 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.
They eventually named their institute for an online trend that had slime enthusiasts replacing the vowels in their name with double o’s, so Kira would become “Kooroo” and slime becomes “Sloomoo.”
From Washington Post • Jun. 30, 2022
Like other Romance languages, Spanish divides most endings of nouns into masculine o’s or feminine a’s.
From Washington Times • Dec. 12, 2021
Plosives, or stops, convey “slower” and “bigger” — as do vowels that are voiced at the back of the throat, like the o in “token” or the double o’s in “food.”
From New York Times • Jan. 15, 2015
Texting and Millennials The phone holds a million x’s and o’s.
From Forbes • Jun. 5, 2013
It was almost perfect, just a fraction flatter and shakier than Betty Jean’s voice had been, the o’s and ah’s parodies of Betty Jean’s pretentious ones.
From "Jacob Have I Loved" by Katherine Paterson
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.