What is a defining feature of a metaphor?

A defining feature of a metaphor is that it makes a direct comparison by stating that one thing "is" another, rather than simply suggesting a similarity between them. This figurative language creates a strong and vivid imagery or connection in a reader's mind. For example, saying "Time is a thief" implies that time steals moments from our lives, conveying a deeper emotional truth rather than just stating that time is similar to a thief.

The other options describe different literary devices. The first option outlines a simile, which uses "like" or "as" to draw comparisons. The third choice refers to hyperbole, which is an exaggerated statement not meant to be taken literally. The fourth choice addresses allusion, specifically historical references that enhance literary meaning. None of these options capture the essence of a metaphor, which is characterized by its direct affirmation of identity between disparate elements.