Word.ws English Dictionary

O. S.

O. S. is the alternative form of OS.

O. S. is the abbreviation of old style.

Meaning of OS

Noun

OS (plural OSes or OSs or OS's)

  1. (UK) An Ordnance Survey map.
    • We've got an OS of the Cuckmere area.

See all 4 meanings of os

Meaning of old style

Noun

Old Style (uncountable)

  1. (historical) The Julian calendar system, especially with reference to Russia, where it continued to be used until the early 20th century.
    • The banded ones were all dressed in white gowns — a gay survival from Old Style days, when cheerfulness and May-time were synonyms — days before the habit of taking long views had reduced emotions to a monotonous average.1891, Thomas Hardy, Tess of the d'Urbervilles, volume 1, London: James R. Osgood, McIlvaine and Co., page 16
  2. (historical) A dating system in which March 25 is the New Year's Day.

Questions about O. S.

What is O. S. the alternative form of?
O. S. is the alternative form of OS.

Words near O. S. in the dictionary

  1. O. C.
  2. o. k.
  3. O. M. G.
  4. O. P. P.
  5. O. P. P.s
  6. O. S.
  7. O. Yeung
  8. o.b.o.
  9. O.C.
  10. O.D.
  11. O.G.

Source and license

Adapted from Wiktionary: O. S. (page history and authors); OS (page history and authors); Old Style (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “O. S..” Word.ws, https://word.ws/o._s.. Based on Wiktionary, CC BY-SA 4.0.