Read the poem "July" by Henrietta Cordelia Ray. Then, answer the question that follows.

Sunshine and shadow play amid the trees
In bosky groves, while from the vivid sky
The sun's gold arrows fleck the fields at noon,
Where weary cattle to their slumber hie.
How sweet the music of the purling rill,
Trickling adown the grassy hill!
While dreamy fancies come to give repose
When the first star of evening glows.

Using context clues in the poem, what is the best definition for the word in bold?

A large breed of dog
A loud instrument
A small stream
A vacant building