Start searching for patterns where there are none and you'll end up finding them, and finding patterns where there are none is as good a definition of madness as springs to mind. (sbnation.com)
The muscles simply don't require better definition for better performance and that's why no exercise can be used to improve definition by itself. (fitnessandpower.com)
For most people, being toned means being lean and having tight, firm muscles with good definition. (fitbodyhq.com)