Gill et al. v. Office of Personnel Management, 682 F.3d 1 (1st Cir. 2012) is a United States Court of Appeals for the First Circuit decision that affirmed the judgment of the District Court for the District of Massachusetts in a lawsuit challenging the constitutionality of section 3 of the Defense of Marriage Act (DOMA), the section that defines the term "marriage" as "a legal union between one man and one woman as husband and wife" and "spouse" as "a person of the opposite sex who is a husband or a wife."