Definition of "irreplaceability" []

• The quality of being irreplaceable; inability to be replaced; (frequently) uniqueness. (noun)

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• "Libraries and museums were asked to put forward documents to be considered for listing, based on their significance, authenticity and irreplaceability."
• "With the announcement of his impending retirement from the bench, a great many commentators have attempted to articulate both Justice Stevens 'influence on the American judicial landscape and his utter irreplaceability as a justice -- neither of which can be overstated."
• "And the more you are convinced, as I am, that this is a fairly significant revolution in media production, the likelier it is that the irreplaceability of newspapers suggests that the next step needs to be vast and varied experimentation, not the transfer of allegiance from one institution to another."