GRE word list

an elaborate or fanciful idea, often whimsical or impractical, especially one that is expressed in poetry or used to describe a person's inflated self-image

Definition Sentence

The poet's conceit of comparing the heart to a furnace was both imaginative and deeply emotional, capturing the intensity of love in a way few metaphors could achieve.

Also metaphor · fanciful idea · extended metaphor · analogy · whim