A one

[ey wuhn]
See more synonyms for A one 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.
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

Related Words for aone

elite, tops