Answer: An extended metaphor, also known as a conceit or sustained metaphor, is an author's exploitation of a single metaphor or analogy at length through multiple linked tenors, vehicles, and grounds throughout a poem or story.
Explanation: An extended metaphor is a metaphor that extends through several lines or even an entire poem. ... A good example of an extended metaphor that carries throughout a poem is Emily Dickinson's 'Hope Is the Thing With Feathers'. She compares hope to a bird and creates examples to make this image stronger.