From Longman Dictionary of Contemporary Englishone of a kindone of a kindONLYthe only one of a particular type of thing Each plate is handpainted and one of a kind. → kind
Examples from the Corpus
one of a kind• Each Keymer clay tile is a work of art, guaranteed one of a kind by the handprint of its maker.• This Persian carpet is one of a kind.• Since his patterns were often one of a kind, he relied little on machinery.• Another comment was that the distinction: inside/outside reminded one of a kind of depersonalised network analysis. 