Which literary device is characterized by the juxtaposition of opposing ideas?

The literary device characterized by the juxtaposition of opposing ideas is an oxymoron. An oxymoron combines contradictory terms to create a new meaning, often highlighting a complex truth or bringing attention to a particular contrast. Classic examples include phrases like "deafening silence" or "bittersweet," where the opposing ideas enhance each other's impact and provoke thought.

In using an oxymoron, the author effectively captures the complexities of human experience or situations that are not easily described with straightforward terms. This device allows for a richer interpretation, encouraging readers to explore themes of paradox and ambiguity within a text.