In this Act,--
         (a) "minor" means a person who has not completed the age of eighteen years;
         (b) "guardian" means a person having the care of the person of a minor or of his property or of both his person andproperty, and includes--
             (i) a natural guardian,
             (ii) a guardian appointed by the will of the minors father or mother,
             (iii) a guardian appointed or declared by a court, and
             (iv) a person empowered to act as such by or under any enactment relating to any Court of wards.
             (c) "natural guardian" means any of the guardians mentioned in section 6.