OS.
An Ordnance Survey map.
Meaning & usage
An Ordnance Survey map.
We've got an OS of the Cuckmere area.
Calton Hill in Edinburgh is located at OS grid ref NT262741.
Initialism of operating system.
I've decided to install two different OSes on my new laptop.
Initialism of ordinary seaman.
Initialism of oppidan scholar.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.