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| A1 or A-1 or A-one |
adjective |
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| Definition: |
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1. top-notch: in excellent or first-rate condition
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informal
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2. fully seaworthy: describes a boat as being well equipped and in excellent condition
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| [Mid-19th century. < Lloyd's Register, an annual British shipping list; A indicated a hull in first-class condition, 1 that the ship was well-provisioned and well-equipped] |
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