What does it mean to tell about something in detail?

To tell about something in detail means to describe it thoroughly, providing specific characteristics, features, or aspects. When someone describes something, they are painting a vivid picture with words, allowing others to understand the subject fully by giving more context and elaboration on various elements. This involves not just naming the item or subject but explaining its qualities, functions, and significance in a comprehensive manner.

The other options relate to different aspects of communication or understanding. Discriminate refers to recognizing or perceiving differences, typically used in the context of distinguishing between things. Disclose means to reveal or make information known, but it does not imply the comprehensive detail that description entails. Diagnose involves identifying a problem or condition, primarily used in medical or analytical contexts, focusing on determining causes rather than providing a thorough account. Thus, describe is the most fitting choice for conveying the idea of telling something in detail.