Define uncategorized. uncategorized synonyms, uncategorized pronunciation, uncategorized translation, english dictionary definition of uncategorized. adj. 1. Uncategorized: 1 adj not categorized or sorted synonyms: uncategorised , unsorted unclassified not arranged in any specific grouping. Uncategorized. taking art to the people. exhibitions. heliopolis sp brazil 2019. vantaa art museum finland 2019. lagos 2018. los angeles 2018. berlin 2018. sao paulo 2018. Categorize definition, to arrange in categories or classes; classify. see more. What is the uncategorized category? in wordpress, when it comes to organizing content, tags and categories are two outstanding and commonly used features. a category refers to a taxonomy, which is used to group and select related posts together.