(n.) A man who makes and leaves a will, or testament, at death.
Example Sentences:
(1) A psychiatrist may be asked to assess the competency of a testator when he or she is planning to create or modify a will or after the death of a testator when the will is challenged.
(2) The finding by a court that the author of a will (the testator) lacked mental capacity or was subject to undue influence at the time the will was executed can invalidate the will.
(3) On examination it is found to be intertwined with the testator's attitudes toward death.
Testatrix
Definition:
(n.) A woman who makes and leaves a will at death; a female testator.