unique

radically distinctive and without equal

• “he is alone in the field of microbiology”
• “this theory is altogether alone in its penetration of the problem”
• “Bach was unique in his handling of counterpoint”
• “craftsmen whose skill is unequaled”
• “unparalleled athletic ability”
• “a breakdown of law unparalleled in our history”

(followed by `to'') applying exclusively to a given category or condition or locality

• “a species unique to Australia”

the single one of its kind

• “a singular example”
• “the unique existing example of Donne”
• “;”
• “;”

highly unusual or rare but not the single instance

• “spoke with a unique accent”
• “had unique ability in raising funds”
• “a frankness unique in literature”
• “a unique dining experience”