2 a: the ability to use one's knowledge effectively and readily in execution or performance b: dexterity or coordination especially in the execution of learned physical tasks
3: a learned power of doing something competently : a developed aptitude or ability <language skills>
http://www.merriam-webster.com/dictionary/skill%5B2%5D
1 obsolete : cause , reason
2 a: the ability to use one's knowledge effectively and readily in execution or performance b: dexterity or coordination especially in the execution of learned physical tasks
3: a learned power of doing something competently : a developed aptitude or ability <language skills>
(emphasis mine)