OS

Abbreviation of Latin oculus sinister.

OS

1. (optometry) the left eye

• O.S.

• OD (“right eye”)

• IPA^(key): /ˌoʊ ˈɛs/

• Audio (US)

  (file)

OS

1. (sports) Abbreviation of Owen Sound.
2. The Ordnance Survey, official mapping agency in Great Britain (see also the noun below).

   Related terms: OSNI

OS (not comparable)

1. Abbreviation of outsize (clothes for large people)
2. Abbreviation of oversize.
3. Abbreviation of Old Style; a term used in English language historical studies to indicate that a date conforms to the Julian calendar instead of the modern Gregorian calendar
4. (screenwriting) Abbreviation of offscreen; indicates a line of dialogue is spoken by someone not visible onscreen

OS (not comparable)

1. (Australia, informal) Abbreviation of overseas.
   • 2015, Mick Houghton, I've Always Kept a Unicorn: The Biography of Sandy Denny:

     You did the overseas trip. You went OS.

   • 2022, The Betoota Advocate, The Australian Dream: Sell everything and move to Betoota, page 33:

     I kind of expanded my circle a bit more when I went OS [overseas].

OS (plural OSes or OSs)

1. (UK) an Ordnance Survey map.

   We've got an OS of the Cuckmere area.

   Calton Hill in Edinburgh is located at OS grid ref NT262741.

2. (software) Initialism of operating system.

   I've decided to install two different OSes on my new laptop.

   • 2008, Karim Yaghmour, Jon Masters, Gilad Ben-Yossef, Building Embedded Linux Systems:

     Some vendors do now have a variant of the per-unit royalty (usually termed a “shared risk,” or similar approach), but it is not strictly the same as for those proprietary embedded OSes mentioned before […]

   • 2010, Jorge Orchilles, Microsoft Windows 7 Administrator's Reference:

     A policy-created scheduled task will be accepted by computers running client OSes as old as Windows 2000 […]

   • 2009, Emmett Dulaney, CompTIA A+ Complete Review Guide:

     In a dual-boot configuration, you install two OSs on the computer (Windows XP and Windows 2000, for example).

3. Abbreviation of ordinary seaman.

• S&O, SO, So, So., s.o., s/o, so

From initialism of English off-screen or English overlapping sound.

OS

1. (chiefly Taiwan, Internet slang) internal monologue

• IPA^(key): [ˈoːɛʃː]

OS (plural OS-ek)

1. (computing) Abbreviation of operating system.

   Synonym: operációs rendszer

From English OS.

• (Tokyo) オーエ​ス [òóéꜜsù] (Nakadaka – [3])
• IPA^(key): [o̞ːe̞sɨᵝ]

OS(オーエス) • (ōesu) 

1. Abbreviation of オペレーティングシステム (operētingu shisutemu, “operating system”); an OS
   • 2011 October 21, Hikaru Nakamura, “その45(よんじゅうこ)　八(はっ)百(ぴゃく)万(まん)と九(くゅう)十(じゅう)九(くゅう)”, in 聖(セイント)☆おにいさん, volume 7 (fiction), Tokyo: Kodansha, →ISBN:

     98(くゅうじゅうはち)の次(つぎ)のＯ(オー)Ｓ(エス)は2000(にせん)のはずなのに……このＯ(オー)Ｓ(エス)『99』(くゅうじゅうくゅう)だもん

     Kyūjūhachi no tsugi no ōesu wa nisen no hazu na noni... Kono ōesu “kyūjūkyū” da mon

     The successor OS of 98 is supposed to be 2000... But this OS is ‘99’

OS

1. operating system; Initialism of operativsystem.
2. the Olympic Games; Initialism of olympiska spelen.

• SO, so