Top Definition
A defect in the minds function. But does not nessercerily affect your intelegence. Saying a mental illness makes you crazy/stupid/funny is like saying an eating disorder makes you fat.
Bill Gates, who is a multi-billionare, invented the personal computer, is very creative and in the top ten smartest men alive suffers from aspergers syndrome, which is infact a mental illness.
by GavinBobJones November 04, 2006
Mental illness refers to a wide range of mental health conditions — disorders that affect your mood, thinking and behavior. Aka A Gianna; as most people refer to it as.
-Gianna has a mental disorder but that doesn't mean she's crazy!
- she has thinking problems so she went to the doctor, they told her that she has a mental illness.
-he talks to a person he claims that, "only he can see, and hear," his mental illness is schizophrenia.
by Softball Shopaholic June 13, 2016
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