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English definition of “prime”

prime

adjective     /praɪm/
main or most important : This is a prime example of good salesmanship . Reckless lending was the prime cause of the crisis . With a market value now of only £2.1bn, it remains a prime takeover target .
of the best quality : The hotel is in a prime location in the city centre . The land is considered prime real estate that could eventually be used for homes .
Prime-1/Prime-2/Prime-3 FINANCE a rating (= measurement of how good something is) given to a loan to show how much of a risk there is that the loan will not be paid back. A Prime-1 rating means that the risk is very low . A Prime-2 or Prime-3 rating means that the risk is higher : Issuers rated Prime-1 have a superior ability for repayment of senior short-term debt obligations .
(Definition of prime adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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