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A term used in the case of mental disorders. Someone with a disorder who can conceal his symptoms or participate in society is considered to be high functioning.
Autism in combination with an IQ of 70 or higher is called high functioning autism.

Bill may be a psychopath, but he is capable of managing a job and family without doing seriously harm to anyone - I think he's high functioning.
by justErinn August 02, 2016
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