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prime

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adjective [only before noun] American English pronunciation: prime /praɪm/
  1. 1
    most important

    Our prime concern was the safety of our customers.

    1. a.
      having the most influence

      Truman had been the prime architect of the NATO alliance.

      a prime force behind international terrorism

  2. 2
    of the highest quality

    a prime location for a business park

    prime beef

    a prime example of 1930s architecture

  3. 3
    most likely to be chosen or to be appropriate for something

    the prime suspect in a murder case

    prime target/candidate:

    The couple became prime targets for press criticism.

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