Amy Lowell was an American poet who wrote during the early 20th century. Her poem 'Lilacs' is a reflection on the beauty of nature and the passing of time. The poem is written in free verse, with no set rhyme or meter, and is composed of four stanzas. In the poem, Lowell uses imagery to evoke a sense of nostalgia and longing for the past. The poem is a reminder that life is fleeting and that we should appreciate the beauty of the present moment.