more a-one

A one

[ey wuhn]
adjective
1.
noting a vessel regarded by a shipping-classification society as being equipped to the highest standard and with equipment maintained in first-class condition.
2.
Also, A number one. Informal. first-class; excellent; superior: The meals there are A one.
Also, A-one, A 1, A-1.


Origin:
1830–40

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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