What is the definition of a solvent?

The definition of a solvent is a substance that dissolves another substance, resulting in a solution. This characteristic of solvents is fundamental in various applications, including chemistry, cleaning, and industrial processes. Solvents are often liquids, but they can also be gases or solids under certain conditions.

In the context of the other options, while substances that enhance color or clean surfaces may use solvents in their formulation, they do not define what a solvent is. The function of enhancing color is typically related to dyes or pigments, while cleaning surfaces involves removing dirt or contaminants, which may include the use of solvents but is not their defining purpose. Similarly, a substance that reacts chemically implies a chemical reaction but does not encompass the broader role of a solvent as something that primarily dissolves. Thus, the clarity of a solvent's primary role as a dissolving agent distinguishes it from these other functions.