 Some uses of figurative language may be understood as both metonymy and metaphor; for example, the relationship between "a crown" and a "king" could be interpreted metaphorically (i.e., the king, like his gold crown, could be seemingly stiff yet ultimately malleable, over-ornate, and consistently immobile).However, in the phrase "lands belonging to the crown", the word "crown" is definitely a metonymy.The reason is that monarchs by and large indeed wear a crown, physically.