### Question
How is the term son or daughter defined?


### Answer
The term **son or daughter** is defined in *5 U.S.C. § 6381* as the following:

> a biological, adopted, or foster child, a stepchild, a legal ward, or a child of a person standing in loco parentis, who is—


(A) under 18 years of age

#### Citation:
  - *5 U.S.C. § 6381*
  - Heading: **PART III-EMPLOYEES > Subpart E-Attendance and Leave > CHAPTER 63-LEAVE > SUBCHAPTER V-FAMILY AND MEDICAL LEAVE**

