adj, noun — 4 senses
Etymology From various rating systems, as that of Lloyd's of London or the condition of insured ships. First attested in 1837.
Informal In good health.
Informal In excellent or top condition.
Of a ship First-class. (Compare A 2 and A 3, which are inferior grades.)
Under the International Union of Railways (French: Union internationale des chemins de fer, UIC) classification system, a steam locomotive that has two coupled driving wheels followed by two trailing wheels, with no leading wheels; also called an 0-2-2.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.