A right is essentially an entitlement or a justified claim. It denotes what we are entitled to as citizens, as individuals and as human beings. It is something that we consider to be due to us; something that the rest of society must recognise as being a legitimate claim that must be upheld.
This does not mean that everything that I regard to be necessary and desirable is a right. I may want to wear the clothes of my choice to school rather than the prescribed uniform. I may want to stay out late at night but this does not mean that I have a right to dress in any way I like at school or to return home when I choose to do so. There is a distinction between what I want and think I am entitled to, and what can be designated as rights.
Rights are primarily those claims that I along with others regard to be necessary for leading a life of respect and dignity. In fact, one of the grounds on which rights have been claimed is that they represent conditions that we collectively see as a source of self-respect and dignity. For example, the right to livelihood may be considered necessary for leading a life of dignity.
Being gainfully employed gives a person economic independence and thus is central for his/her dignity. Having our basic needs met gives us freedom to pursue our talents and interests. Or, take the right to express ourselves freely. This right gives us the opportunity to be creative and original, whether it be in writing, or dance, or music, or any other creative activity. But freedom of expression is also important for democratic government since it allows for the free expression of beliefs and opinions. Rights such as the right to a livelihood, or freedom of expression, would be important for all human beings who live in society and they are described as universal in nature.