Definition of "unreplaceable" [unreplaceable]

• Impossible to replace (adjective)

WordNet. Princeton University. 2010.

• "They have tried to find a new person to play the roll, but folk who enjoyed this magnificent show, me included, still think that Linda Carter will always be unreplaceable as Wonder Woman."
• "As I observe each moment go by, I know I've experienced a moment that will never happen again, unreplaceable and dear."
• "And then one day my hard drive crashed, losing hundreds of gigs of files, many of which were unreplaceable."