Which of the following best defines a metaphor?

A metaphor is indeed best defined as a figure of speech that makes a direct comparison between two unlike things without using "like" or "as." This form of figurative language expresses an idea or feeling by describing one thing as if it were another, which allows for a deeper understanding of the qualities or characteristics of the subject being described. For example, saying "Time is a thief" suggests that time steals moments away in a way similar to how a thief would steal valuables, even though time and a thief are fundamentally different. This direct approach creates vivid imagery and helps convey meaning in a more impactful way.

In contrast, a comparison using "like" or "as" is specifically known as a simile, not a metaphor. Personification, which gives human traits to non-human entities, is also a different literary device altogether. A literal description, on the other hand, does not involve any figurative language and retains the actual meaning of the object being described.