A skill is the learned ability to perform an action with determined results with good execution often within a given amount of time, energy, or both. Skills can often be divided into domain-general and domain-specific skills. For example, in the domain of work, some general skills would include time management, teamwork and leadership, self-motivation and others, whereas domain-specific skills would be used only for a certain job. Skill usually requires certain environmental stimuli and situations to assess the level of skill being shown and used.

A skill may be called an art when it represents a body of knowledge or branch of learning, as in the art of medicine or the art of war.^[1] Although the arts are also skills, there are many skills that form an art but have no connection to the fine arts. A practice is when the learned skill is put into practice. An art or skill may be the basis for a profession, trade, or craft.