A-1

/ay"wun"/, adj.

See A one.

Also, A 1.

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A-1 «AY WUHN», adjective.

Informal. A one; first-rate.

A 1,

1. (of a ship) in the best condition (from a double symbol used originally by Lloyd's Register, “A” applying to the hull and “1” to the engines, rigging, and other operating equipment).

2. Informal. A one; first-rate.