"Skill consists in the ability to bring about some end result with maximum certainty and minimum outlay of energy, or of time and energy."Goal Oriented - Running fast, throwing a football, making a TD catch, kicking a field goal, making a perfect form tackle
Meeting a performance goal with maximum certainty - Running a way that allows for winning a race...not relying on what we might call luck for your achievements.
Minimization- of energy - Skillful people make a task look easy (both from physiological and psychological perspectives) - normally this is a function of practice which contributes to automaticity. Something we might call Grace.
Learned through practice - These types of skill are generally not normal movements like walking or chewing...These types of skills are complexed movements that require some focused effort towards gaining mastery.
Edited from the original text at Science.smith.edu
You have to look the part if you are ever going to perform at a high level. You have to be graceful in your movement. - Coach Ball