- first-rate, the very best; “she’s a prime girl, she is; she is A 1.”—_Sam Slick_. The highest classification of ships at Lloyd’s; common term in the United States; also at Liverpool and other English seaports. Another, even more intensitive form is “first-class, letter A, No. 1.” Some people choose to say A I, for no reason, however, beyond that of being different from others.
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