/ ˈdʒʌstɪfaɪəbl; NAmE ; ˌdʒʌstɪˈfaɪəbl/ adjective
existing or done for a good reason, and therefore acceptable
SYN legitimate :
justifiable pride
► jus·ti·fi·ably / -əbli; NAmE / adverb :
The university can be justifiably proud of its record.
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WORD ORIGIN
early 16th cent. (in the sense justiciable ): from French , from justifier to justify.