guardian
/ˈɡɑːdɪən/noun
A person who protects or watches over someone or something.
Example sentences
- “After her parents died, her aunt became her legal guardian.”
- “The park ranger sees herself as a guardian of the forest.”
In law, a guardian has formal authority over a child or dependent adult, which is why school forms say 'parent or guardian'. A 'guardian angel' protects invisibly.