Which of the following is NOT a strategy used for expanding definitions?

Over-simplification is not a strategy used for expanding definitions because it typically aims to reduce complexity rather than enhance understanding. When expanding a definition, the goal is to clarify and elaborate on a term or concept, providing a fuller understanding.

In contrast, examples serve to illustrate a term by providing concrete instances that help readers grasp its meaning. Negation can be effective in defining something by explaining what it is not, thus clarifying the boundaries of the concept. Visual aids further support an expanded definition by presenting information in a format that complements the textual explanation, making it easier to comprehend. These strategies contribute to a more nuanced understanding of a concept, whereas over-simplification detracts from the depth and clarity necessary for effective communication.