Define uncategorized. uncategorized synonyms, uncategorized pronunciation, uncategorized translation, english dictionary definition of uncategorized. adj. 1. uncategorized not …. Uncategorized: 1 adj not categorized or sorted synonyms: uncategorised , unsorted unclassified not arranged in …. This field is for validation purposes and should be left unchanged. Categorize definition, to arrange in categories or classes; classify. see more.