Study for the SAT Vocabulary 2025 Test. Master vocabulary with flashcards and questions, each with detailed explanations. Get ready for your exam!

Dissension refers to a sharp difference of opinion or disagreement among individuals or groups. It captures the idea that people hold conflicting views, which can lead to disputes or discord. In contexts where decisions are being made or discussions are taking place, dissension often indicates a breakdown in consensus, highlighting diverging perspectives.

The focus on a "sharp difference of opinion" aligns perfectly with the nature of dissension, as it emphasizes the intensity and clarity of the disagreement involved. This term is commonly used in political discussions, group dynamics, and even in personal relationships, where differing viewpoints can create tension or conflict.

On the other hand, the other choices point towards concepts that do not embody the essence of dissension. A lack of awareness implies ignorance rather than disagreement; agreement suggests harmony, which contradicts the notion of differing opinions; and unity refers to coming together rather than experiencing division. Thus, the definition that best captures the concept of dissension is the one that highlights the existence of a sharp difference in opinion.