Definition of "rarest" []

• Superlative form of rare: most rare. (adjective)

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• "For their delectation, Mr. Singer has located a copy of what he calls the rarest Churchill book in the world: "For Free Trade," a small red paperback assemblage of speeches delivered to Parliament and published in 1906 by Hatchards, the still extant Piccadilly bookshop."
• ""To tell such a story convincingly a man must have what I call the rarest of literary gifts -- the power to condense."
• "They said the hardest player to find -- the "rarest" -- was actually former QPR and current Bolton defender Danny Shittu."