The 'basic structure' doctrine, as established by the Supreme Court, is not explicitly defined in the Constitution with a fixed list of components. While elements like federalism, secularism, fundamental rights, and democracy are considered part of it, the Constitution itself does not list them as its definition. Judicial review, however, is an integral part of the Indian Constitution, serving to uphold the rule of law, protect fundamental rights, and ensure that the government acts within its constitutional limits, thereby preserving the Constitution's core ideals and citizens' liberties.