a-one   (TTS Sound)

The adj a-one has 1 sense

• ace, A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops -- (of the highest quality; "an ace reporter"; "a crack shot"; "a first-rate golfer"; "a super party"; "played top-notch tennis"; "an athlete in tiptop condition"; "she is absolutely tops")