We found one dictionary that defines the word biggest/best etc. of its/their kind:

General (1 matching dictionary)

▸ Words similar to biggest/best etc. of its/their kind ▸ Usage examples for biggest/best etc. of its/their kind ▸ Idioms related to biggest/best etc. of its/their kind ▸ Wikipedia articles (New!) ▸ Words that often appear near biggest/best etc. of its/their kind ▸ Rhymes of biggest/best etc. of its/their kind ▸ Invented words related to biggest/best etc. of its/their kind