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Dictionary definition for the word a-one
a-one 1 definition

1: 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" [syn: ace, crack, first-rate, super, tiptop, topnotch, {tops(p)}]
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