If you refer to a dysfunction in something such as a relationship or someone's behaviour, you mean that it is different from what is considered to be normal. his severe emotional dysfunction was very clearly apparent
A failure to function in an expected or complete manner. Usually refers to a disorder in a bodily organ (e.g. erectile dysfunction), a mental disorder, or the improper behavior of a social group
Any disturbance or impairment in the normal functioning of an organ or body part