The term stepdame refers to the mother of one's stepchildren. There are various synonyms for this term that one can use interchangeably depending on the context. For instance, stepmother, which is a more popular term, is used to refer to a woman who is married to one's parent but is not one's biological mother. Another synonym is the term second mother, which refers to a woman who interacts with one's child on a regular basis, but is not biologically related to the child. Additionally, the term bonus mom is used to refer to a stepmom who has formed a close bond with her stepchildren.