Full Idea
Precision is but one virtue of a definition, one that must be balanced against simplicity, elegance, conciseness, theoretical illumination, and practical usefulness.
Gist of Idea
Precision is only one of the virtues of a good definition
Source
Linda Trinkaus Zagzebski (Virtues of the Mind [1996], III 2.1)
A Reaction
Illumination looks like the dream virtue for a good definition. Otherwise it is just ticked as accurate and stowed away. 'True justified belief' is a very illuminating definition of knowledge - if it is right. But it's not very precise.
Book Reference
Zagzebski,Linda: 'Virtues of the Mind' [CUP 1996], p.266