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Definition 2024


A1

A1

See also: a1, A-1, and A 1

English

Noun

A1

  1. A standard paper size, defined by ISO 216 to have dimensions: 841 x 594 mm (840.90 x 594.60 mm)
    a sheet of A1 paper
See also

Etymology 2

From various rating systems, as that of Lloyd's of London or the condition of insured ships. First attested in 1837.

Alternative forms

Adjective

A1 (not comparable)

  1. (informal) In good health.
  2. (informal) In excellent or top condition.
  3. (of a ship) First-class. (Compare A 2 and A 3, which are inferior grades.)

Etymology 3

Proper noun

A1

  1. Under the International Union of Railways ("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.

a1

a1

See also: A1, A-1, and A 1

English

Adjective

a1 (not comparable)

  1. first rate or excellent
  2. (of a ship) in first class condition

Mandarin

Romanization

a1 (Zhuyin )

  1. Alternative spelling of ā