What is Fundamental Rights?

Legal Definition
Fundamental rights are generally regarded set of legal protections in the context of a legal system, where such system is itself based upon this same set of basic, fundamental, or inalienable rights. Such rights thus belong without presumption or cost of privilege to all human beings under such jurisdiction. The concept of human rights has been promoted as a legal concept in a large part owing to the idea that human beings have such "fundamental" rights, such that transcend all jurisdiction, but are typically reinforced in different ways and with different emphasis within different legal systems. These are the social claims or privileges that are provided by the state to its citizens. They are inviolable and remain attached against their breaching. These rights are applicable to all, irrespective of their backgrounds.
-- Wikipedia
Legal Definition
Fundamental rights are a group of rights that have been recognized by the Supreme Court as requiring a high degree of protection from government encroachment. These rights are specifically identified in the Constitution (especially in the Bill of Rights), or have been found under Due Process. Laws limiting these rights generally must pass strict scrutiny to be upheld as constitutional. Examples of fundamental rights not specifically listed in the Constitution include the right to marry and the right to privacy, which includes a right to contraception and the right to interstate travel.
Legal Definition
These are the rights given to people of life, liberty, property, freedom of speech, assembly, press and religion.