a-one meaning

Adjective: A-one

1. Of the highest quality
   - ace, crack, first-rate, super, tiptop, topnotch, top-notch, tops

See also: superior

• -one:     /-ōn/ (chem)  ...
• a one for:     (informal) & ...
• as one:    [American idiom]as ...

Examples

1. they are in a superb hotel, getting a-one treatment.