Constitutional government means

1. The question asks for the meaning of 'Constitutional government'. 2. 'Constitutional government' essentially means a government that operates within the framework of a constitution, which establishes the fundamental principles, structures, processes, and limits of that government's power. 3. Option (A) describes a specific form of government (representative, federal) but not the core meaning of constitutionalism. 4. Option (B) describes a feature of some parliamentary systems (figurehead Head of State with nominal powers), not the definition of constitutional government. 5. Option (C) describes a feature of some presidential systems (Head of State/Government with real powers), not the definition of constitutional government. 6. Option (D) accurately defines the concept: a government limited by the terms of the Constitution. The essence of constitutionalism is the limitation of arbitrary power through established laws and principles laid down in the Constitution. Therefore, a constitutional government is fundamentally one whose powers are defined and limited by a constitution.