os

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a mouth or mouthlike opening
noun a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
noun (computer science) software that controls the execution of computer programs and may provide various services

Borrowed from Latin os (“a bone”).

SIEGES OF MASSAGA AND ORA. — The Anabasis of Alexander : $b or, The history of the wars and conquests of Alexander the Great, Arrian
“Non levior cippus nunc imprimit ossa? — Essays of Michel de Montaigne — Complete, Michel de Montaigne
You know the proverb, tarde venientibus ossa." — Cameron of Lochiel, Philippe Aubert de Gaspé

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