Which definition best describes "testatrix"?

The term "testatrix" specifically refers to a female individual who creates a will. It is derived from Latin, where "testator" refers to a male who makes a will, and the addition of the feminine suffix "atrix" denotes gender. Therefore, when a woman writes and executes a will, she is identified as a testatrix. This legal distinction is important in the context of estate planning and succession law, as it clarifies the gender of the person making the will and is relevant in legal documentation.

The other definitions do not accurately reflect what a testatrix represents. A man making a will would be termed a testator, a court dealing with wills would be referred to as a probate court, and witnesses to a will are simply called witnesses or attesting witnesses. Thus, the correct definition includes the specific role and gender of the individual crafting the will.