Legitimate power is the ability to influence through authority, the right by virtue of one's organization position or status to exercise control over persons in subordinate position.
In another example, if an individual attempts to convince others that something is "right", they can invoke generally accepted arguments that support their agenda. Interest groups must legitimate their courses of action based on invoking specific social norms and values. Invoking these norms and values allows the group to proceed in a rational and coherent manner with the expectation that their subsequent behavior is legitimated by the norms and values which guide their organizations.
Legitimation can also be used as a legal term where a father of a child born out of wedlock becomes the child's legal father. Prior to legitimation, the child is said to be illegitimate. Once a child has been legitimated, he or she is entitled to all of the benefits from that father as he or she would if that man had been married to the child's mother at the time of the child's birth. The father is responsible for providing support to the child and the child is entitled to inherit from the father.