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. Categorize definition, to arrange in categories or classes; classify. see more. The two biggest reasons you should avoid using “uncategorized” are fairly straightforward: it makes you seem careless, resulting in your blog appearing unprofessional; it doesn’t help your readers find the content they’re looking for; when you have blog posts listed as “uncategorized,” it simply looks like you forgot to classify the.