Household size means the number obtained by adding the number of persons specified in this definition. In calculating household size, no individual shall be counted more than once. If the intending immigrant's spouse or child is a citizen or already holds the status of an alien lawfully admitted for permanent residence, then the sponsor should not include that spouse or child in determining the total household size, unless the intending immigrant's spouse or child is a dependent of the sponsor.
8 CFR § 213a.1
As used in this part, the term: