There are 4 definitions of OS in English:

OS

Syllabification: OS

abbreviation

  • 1(In calculating dates) Old Style.
  • 1.1 Computing Operating system.
  • 1.2Ordinary Seaman.
  • 1.3(In the UK) Ordnance Survey.
  • 1.4(As a size of clothing) outsize.
  • 1.5Out of stock.
  • 1.6Overseas.

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Word of the day kerf
Pronunciation: kəːf
noun
a slit made by cutting with a saw

There are 4 definitions of OS in English:

Os

Syllabification: Os

symbol

  • The chemical element osmium.

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There are 4 definitions of OS in English:

os1

Syllabification: os

noun (plural ossa /ˈäsə/)

Anatomy
  • A bone (used chiefly in Latin names of individual bones, e.g., os trapezium).
    More example sentences
    • In this group, the cortex of the os sacrum was destroyed and had a spongelike rather than compact appearance.
    • Besides this unambiguous distinguishing character, a second, derived character, exists which is particular to the Carnivora: in the wrist the joint bones, scaphoid, lunate, and os centrale, are fused.

Origin

Latin.

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There are 4 definitions of OS in English:

os2

Syllabification: os

noun (plural ora /ˈōrə/)

Anatomy
  • An opening or entrance to a passage, especially one at either end of the cervix of the uterus.
    More example sentences
    • The distance between the internal and external os was measured both as a straight line and also as a curved line along the endocervical canal.
    • The internal os closes by 3 days, the external os by 3 weeks.

Origin

mid 18th century: from Latin os 'mouth'.

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