In the context of relationships, mixed signals are when a person is expressing interest in someone while also simultaneously expressing a lack of interest or a desire to keep their distance, causing confusion for the other person.

What do mixed signals from a girl mean?

A woman gives out mixed signals when she is not sure about her own feelings. She is not adept at communicating her own feelings. She is herself not aware that her behavior is interpreted as mixed signals by the opposite sex. She gives mixed signals because she is playing hard to get.