Word.ws English Dictionary

ost

ost is the obsolete form of oast.

Meaning of oast

Noun

oast (plural oasts)

  1. (UK) A kiln for drying tobacco, malt and especially hops.

Noun capitalized: OST

OST (plural OSTs)

  1. (abbreviation, initialism) Initialism of original soundtrack.
    • I really like the OST of that game.

Proper noun capitalized: OST

OST

  1. (abbreviation, initialism) Initialism of Outer Space Treaty: a treaty that represents the basic legal framework of international space law, signed in 1967.
    • The most important source of space law is the 1967 Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies (OST).¹⁶ […] The OST is a product of the Cold War era when the United States and the Soviet Union—the...2014, John G Sprankling, “Rights in Airspace and Outer Space”, in The International Law of Property, Oxford University Press, →ISBN, page 176
  2. (abbreviation, initialism) Initialism of Open Skies Treaty.
  3. (UK, abbreviation, historical, initialism) Initialism of Office of Science and Technology.

Forms of ost

pluralosts
pluralOSTs

Questions about ost

What is ost the obsolete form of?
Ost is the obsolete form of oast.
What part of speech is ost?
Ost can be a noun or a proper noun.
What is the plural of ost?
The plural of ost is osts.

Words near ost in the dictionary

  1. ossuarium
  2. ossuariums
  3. ossuary
  4. Ossun
  5. Ossé
  6. ost
  7. ostalgia
  8. ostalgias
  9. Ostanek
  10. Ostap
  11. Ostara

Source and license

Adapted from Wiktionary: ost (page history and authors); OST (page history and authors); oast (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: “ost.” Word.ws, https://word.ws/ost. Based on Wiktionary, CC BY-SA 4.0.