Dinah was the daughter Leah had by Jacob. Dinah went out to visit the women of the land.
References for Genesis 34:1
Hamor the Hivite was the ruler of that area. When his son Shechem saw Dinah, he took her and raped her.
Then his heart longed for Jacob's daughter Dinah. He fell in love with her and spoke tenderly to her.
Shechem said to his father Hamor, "Get me that woman. I want her to be my wife."
Jacob heard that his daughter Dinah had been made "unclean." His sons were in the fields with his livestock. So he kept quiet about it until they came home.
Then Shechem's father Hamor went out to talk with Jacob.