Chapter 2 provides a history of the recognition of the girl child in the international legal framework, from the universalist to the qualified universalist approach, and finally to the girl child as a distinct rights holder under international law. Chapter 2 thereafter conducts an examination of the definition of girl child in the English language. It critically studies the terminology presently used to define her and explores the etymology of the expression ‘girl’ and its semiotics of inferiority and subordination throughout history. The chapter analyzes the two vectors of identity of the girl child: femalehood and childhood. It examines the conceptions of girlhood and its 1) dimensions, 2) boundaries and 3) divisions. It discusses age-based and competence-based boundaries, and parameters for the end of girlhood in the English language and in the law, including definitions concerning puberty, youth and majority. It also suggests divisions within girlhood, namely young girls and adolescent girls.