If you describe a person or thing as ~, you mean that there is no-one else or nothing else of the same kind and so you cannot make judgments about them based on other things. (FORMAL)
Japanese politics are ~.
= unique
ADJ
If you describe a person or thing as ~, you mean that there is no-one else or nothing else of the same kind and so you cannot make judgments about them based on other things. (FORMAL)
Japanese politics are ~.
= unique
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012