Initialism of original soundtrack.

(law, space science) Initialism of Outer Space Treaty: a treaty that represents the basic legal framework of international space law, signed in 1967. / Initialism of Open Skies Treaty.

Alternative form of oast

plural of OST

plural of ost

(ornithology) A large flightless bird of the genus Struthio. / The most widespread species of the genus, known as the common ostrich (Struthio camelus).

The largest coastal city of Belgium.

(modal) Seemingly, apparently, on the surface.

Apparent, evident; meant for open display. / Appearing as such; being such in appearance; professed, supposed (rather than demonstrably true or real).

(transitive, Ancient Greece, historical) To ban a person from a city for five or ten years through the procedure of ostracism.