Immediate Family. Individuals who are closely related by blood, marriage, or adoption, or who live within the same household, such as a spouse, domestic partner, parent, child, brother, sister, aunt, uncle, grandparent, grandchild, niece, or nephew.
7 CFR § 4280.103
Terms used in this subpart are defined in either 4279.2 of this chapter or in this section. If a term is defined in both 4279.2 and this section, it will have, for purposes of this subpart only, the meaning given in this section. Terms used in this subpart that have the same meaning as the terms defined in this section have been capitalized in this subpart.