1. (关系、行为等的)不正常,异常
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.

2. 机能障碍
If someone has a physical dysfunction, part of their body is not working properly.

1. (medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group

e.g. erectile dysfunction
sexual relationship dysfunction

Synonym: disfunction