What is a defining characteristic of "metaphor"?

A defining characteristic of metaphor is that it directly compares two dissimilar things without using the words "like" or "as." This allows for a deeper connection between the two subjects, suggesting that one thing embodies certain qualities of another, thereby enriching the meaning and allowing for more vivid imagery and interpretation.

In contrast, the other choices refer to different forms of comparison. The use of "like" or "as" is specific to similes, which are not metaphors. Metaphors also do not require a detailed factual basis; instead, they often rely on emotional or conceptual resonance. While metaphors can certainly express universal truths, they are not limited to that purpose alone; they can also be used for personal, specific, or imaginative expressions. Therefore, the nature of metaphor lies in its ability to create direct and imaginative connections between disparate ideas.