not categorized or sorted
"The uncategorized emails sat in the inbox, waiting to be sorted into their proper folders."
Not having been sorted into a category.
"The unsorted emails remained uncategorized in the inbox, making it difficult to find important messages later."
In plain English: Uncategorized means something that hasn't been put into any specific group yet.
"The email from an unknown sender landed in my uncategorized folder instead of the inbox."
The word uncategorized is formed by adding the prefix un- to categorized to indicate that something has not been assigned a specific class or group. This straightforward construction emerged naturally as English speakers needed a way to describe items lacking classification within existing systems.