Definition: Meaning of, Ruby, Jack in English to English dictionary.
Pronunciation:/ ʤæk /
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(1911-67) the man who killed Lee Harvey OSWALD two days after OSWALD was charged with killing President John F. KENNEDY . Some people believed that these actions were part of a CONSPIRACY (= secret plan) to kill the President, and that Ruby shot OSWALD to prevent him from giving any information about it.