Chapter 7 considers the boundary for the end of girlhood under international law. It applies Welby’s Meaning Triad to discuss the sense, meaning and significance of the current definition of child in the CRC. It argues that this definition is problematic on several grounds: absence of a minimum age for the end of girlhood, discrepancy between the end of girlhood and emancipation, possibility of unequal treatment on the grounds of gender, national domicile, and between girls under domestic law. It examines positive features of the CRC and the benefit for girls to be covered until eighteen years. It also analyzes ‘childist’ provisions of the CRC and empowering provisions of other treaties, and whether girls should reach majority before eighteen years. It conducts case studies of child justice and child marriage. Finally, it employs semioethics to identify amendments to the definition of child in the CRC that would tackle its shortcomings.