Answer:
Based on the context provided in the poem, the best definition for the word "repose" is rest or relaxation. The poem describes the soothing atmosphere of nature, including sunshine, shadow, trees, groves, fields, and a purling rill (a murmuring stream). It mentions the weary cattle seeking slumber, and the dreamy fancies that come with the evening star. The word "repose" is used to convey a sense of peacefulness, tranquility, and rest that is associated with the arrival of evening and the beauty of nature.
Step-by-step explanation: