Meaning of “crown” - Learner’s Dictionary

crown

verb [ T ] uk us /kraʊn/
MAKE KING/QUEEN

to put a crown on someone's head in an official ceremony that makes them a king or queen:

[ often passive ] Queen Elizabeth II of England was crowned in 1952.
ON TOP literary

to be on top of something :

A large domed ceiling crowns the main hall.
BEST PART

to be the best or most successful part of something:

The book crowned his successful writing career.

(Definition of “crown verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)