1. Alzheimer’s semipostal stamp (a) Definitions In this section— (1) the term Alzheimer’s semipostal stamp means the Alzheimer’s semipostal stamp that the Postal Service began offering for sale on November 30, 2017, under the discretionary authority under section 416(b) of title 39, United States Code; (2) the term Postal Service means the United States Postal Service