(adjective) to not be able to read or write in a specific language. Used loosely, it can describe someone who is just an incredibly sloppy speller.

Running for exercise and picking up trash you find along the way. It's good for the body, mind, soul, and environment! Started in Sweden but is making its way to the U. S.

Chingy,that crappy lil pop rapper who can't spell!

People who cannot read or write

A moron with the approximate education of a fly at best.

A class of a large, and growing, number of people, particularly children, who are unable to read or write.
Illiteracy is beginning to take over the United States of America. After seeing all those Hooked On Phonics advertisements, I have concluded that our country is becoming more and more filled with illiterate brats who deserve a good slapping upside the head.
Apparently, illiteracy is so common that there is evidence of illiteracy in China (the world's #2 superpower). Illiterate children is said to be the result of lazy, irresponsible parents, therefore resulting in much lack of education. It's times like this that, although education sucks (because of schools and how boring they are and having to put up with punk-ass bitches with cruel attitudes), it is very necessary.

If you had a kid who couldn't read a word, wouldn't you like to slap him upside the head too?

A person who is unable to read or write. Basically, an unintelligent person who has the approximate education of a second grade English student, if not worse.