Dictionary.com
definitions
  • synonyms

A one

[ey wuhn]
See more synonyms on Thesaurus.com
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.
Show More
Also A-one, A 1, A-1.

Origin of A one

First recorded in 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for a-number-one

Historical Examples

  • I got a repertation with the local shipper for havin' A-number-one fruit.

    The Corner House Girls in a Play

    Grace Brooks Hill

  • And she said these was A-Number-One beagles, being sure to get a rabbit if one was in the country.

    Somewhere in Red Gap

    Harry Leon Wilson