What does "decrown" mean?

To deprive of a crown; to discrown.

Decrown

/diːˈkɹaʊn/ verb

verb ·Rare ·Advanced level

Verb

1
To deprive of a crown; to discrown. transitive
"the Popes […] authority to decrowne Kings"
2
To decoronate (a tooth). transitive
3
To remove the crown of a pineapple, strawberry, etc. transitive
4
To deprive of supremacy or exaltedness. figuratively, transitive
"Laughter for laughter's sake and the allied mocking of social values and decrowning of all dogmatic forms of authority this entails."

"the Popes […] authority to decrowne Kings"

From de- + crown, or French découronner.