What does the term "definition" indicate regarding a rabbit's fur?

The term "definition" in relation to a rabbit's fur refers specifically to the clarity of color contrasts within the coat. This aspect is crucial in judging the quality and aesthetic appeal of a rabbit's fur, particularly in competitive settings such as shows or fairs. A well-defined coat showcases distinct and clearly separated colors, which enhances the overall appearance of the rabbit. This clear contrast can highlight the structure of the fur and accentuate the rabbit's features, making it a critical component in breed standards and evaluation criteria.

The other aspects, such as softness, length, and pattern, while important in evaluating a rabbit’s fur, do not align with the specific connotation of "definition." Softness pertains to the texture, length relates to the measurement of the fur, and pattern describes the design and markings, but none of these accurately capture what is meant by "definition" in this context.