### Question
How is the "priority supplement" defined?


### Answer
The term **priority supplement** is defined in *21 U.S.C. § 321* as follows -

> a drug application referred to in section 101(4) of the Food and Drug Administration Modernization Act of 1997 (111 Stat

#### Citation:
  - *21 U.S.C. § 321*
  - Heading: **CHAPTER 9-FEDERAL FOOD, DRUG, AND COSMETIC ACT > SUBCHAPTER II-DEFINITIONS**

