What does "os" mean?
An Ordnance Survey map.
Os
/ˌoʊ ˈɛs/ adj, adv, name, noun, slang
adj, adv, name, noun, slang ·Common ·High school level
Meaning at a glance
- Primary sense: An Ordnance Survey map.
- Grammar: os is listed as adj, adv, name, noun, slang.
- Nearest alternatives: atomic number 76, bone, mouth, naughts.
- Usage evidence: Although it's "Mac OS X", that doesn't mean that the Mac OS code itself has been upgraded to a new version.
How to use "os"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "os" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "os" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "os" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "os" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "os" is acting as adj, adv, name, noun, slang in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "atomic number 76" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "os", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 An Ordnance Survey map. UK
"We've got an OS of the Cuckmere area."
- 2 Synonym of bone.
"I was once, I remember, called to a Patient, who had received a violent Contuſion in his Tibia, by which the exterior Cutis was lacerated, ſo that there was a profuſe ſanguinary Diſcharge; and the interior Membranes were ſo divellicated, that the Os or Bone very plainly appeared through the Aperture of the Vulnus or Wound."
- 3 An opening or entrance to a passage, particularly one at either end of the cervix, internal (to the uterus) or external (to the vagina). sometimes
"The instrument closed, as seen in Fig. 1, is then passed along the finger to the os, in and through the cervix up to the fundus of the uterus, which may be determined both by the distance and the resistance to the broad rounded head of the Capiat."
- 4 An osar or esker.
- 5 Alternative form of o's. alt-of, alternative, rare
Show 9 more definitions
- 6 plural of O form-of, plural
- 7 rigid connective tissue that makes up the skeleton of vertebrates wordnet
- 8 Initialism of operating system. abbreviation, alt-of, initialism
"I've decided to install two different OSes on my new laptop."
- 9 a mouth or mouthlike opening wordnet
- 10 Initialism of ordinary seaman. abbreviation, alt-of, initialism
- 11 the left eye wordnet
- 12 Initialism of oppidan scholar. abbreviation, alt-of, initialism
- 13 (computer science) software that controls the execution of computer programs and may provide various services wordnet
- 14 a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known wordnet
Adjective
- 1 Initialism of outsize, clothes for large people. abbreviation, alt-of, initialism, not-comparable
- 2 Initialism of oversize. abbreviation, alt-of, initialism, not-comparable
- 3 Initialism 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. abbreviation, alt-of, initialism, not-comparable
- 4 Abbreviation of offscreen, indicating a line of dialogue is spoken by someone not visible onscreen. abbreviation, alt-of, not-comparable
- 5 Initialism of over shoulder. abbreviation, alt-of, initialism, not-comparable
Adverb
- 1 Initialism of overseas. Australia, abbreviation, alt-of, informal, initialism, not-comparable
"You did the overseas trip. You went OS."
Proper Noun
- 1 Initialism of Owen Sound. abbreviation, alt-of, initialism
- 2 The Ordnance Survey, official mapping agency in Great Britain (see also the noun below).
- 3 Initialism of Old Saxon. abbreviation, alt-of, initialism
Synonyms
All synonymsExample
"Although it's "Mac OS X", that doesn't mean that the Mac OS code itself has been upgraded to a new version."
Common questions
What is a synonym for "os"?
Common synonyms include: atomic number 76, bone, mouth, naughts, oculus sinister, operating system.
How do you use "os" in a sentence?
Although it's "Mac OS X", that doesn't mean that the Mac OS code itself has been upgraded to a new version.
How do you pronounce "os"?
Pronounced /ˌoʊ ˈɛs/.
Etymology
Etymology 1
Borrowed from Latin os (“a bone”).
Etymology 2
Unadapted borrowing from Latin ōs (“the mouth”).
Etymology 3
Borrowed from Swedish ås.
Etymology 4
From o + -s.