Amy by Elton John is a nostalgic and melancholic reflection on a past romantic relationship with a woman named Amy. The song captures the longing and heartache of losing someone special, as well as the enduring impact that they have on one's life. The key themes include love, loss, and memory. Poignant moments in the song highlight the vivid memories of the time spent with Amy, underscoring the deep emotional connection shared and the void left by her absence.