"The Eagle" is a short, six-line poem that is rich with descriptive imagery of the natural world. This poem provides a vivid image of a proud eagle atop a mountain and, ultimately, the eagle's "fall."
Line 3, the last line of the first stanza, reads,
Ring'd with the azure world, he stands.
To understand this line, the first thing to note is that the word "azure" refers to a bright blue color that is often associated with the sky. By "ring'd with the azure world," the poet is referring to the vast blue sky which surrounds the eagle like a ring. The "azure world," in this line, might also refer to the blue of the sea beneath the eagle, which is mentioned in the following line:
The wrinkled sea beneath him crawls;
Because the eagle stands with the sky above him and the sea below him, the "azure world" could refer to both the sky and the sea, the vast blue expanses of the natural world that surround the eagle like a ring.