This meaning refers to someone who is legally responsible for the care of a child or someone unable to manage their own affairs. It often implies a protective role.

This usage implies someone who defends or shields another from harm, often suggesting a more general protective role beyond legal responsibilities.

This meaning refers to someone who supports or champions a person, organization, or activity, often in a financial or sponsorship capacity.

In this context, it refers to a mother or father, highlighting the familial aspect of the word and the responsibility they bear for their children's upbringing.