n. administration of an estate's assets in another state. An "ancillary administrator" is chosen by the executor or administrator of an estate to handle the property (primarily real estate) of the deceased's estate in a state other than the one in which the estate is probated. Example: John Dunn dies in Montana where he had been living and leaves a parcel of land in downtown Columbus, Ohio. There must be ancillary administration in Ohio to obtain Ohio court approval and tax agency clearance. Technically ancillary means "aiding" or "subordinate."