"wider still, and wider, shall thy bounds be set; " in a response of two to three sentences, explain how these lines reveal the poet's vision of the british empire:

"Wider still, and wider, shall thy bounds be set;" if this refers to the British Empire I believe it means that it is commenting on the expanding boundaries of this Empire as new lands are conquered and turned into colonies. At one time, Britain had  far flung colonies in Africa, Asia and also the 13 colonies and Canada before the independence movements of the late 18th century in America and also 20th century in Africa. In other words, at one time the world was colonized by primarily the Spanish, the Portuguese and the British and the colonies had to supply the raw materials to the colonizers and were an appendage of the big powers.

the underlined phrase is an example of : understatment

stating you point whats is aking you to write about?