34 Pa. Code § 65.151
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Dependent child-An individual's unmarried child, stepchild, legally adopted child or illegitimate child, who at the beginning of the individual's current benefit year, was wholly or chiefly supported by the individual and was 17 years of age or younger, or if 18 years of age or older, because of physical or mental infirmity was unable to engage in a gainful occupation.
Dependent spouse-An individual's lawful husband or wife who is living in the same household and who is being wholly or chiefly supported by the individual at the beginning of such individual's benefit year.
Wholly or chiefly supported-The dependent is receiving more than 1/2 of the cost of his support from the individual.
34 Pa. Code § 65.151