Pro·fi·cience Pro·fi·cien·cy, n. The quality of state of being proficient; advance in the acquisition of any art, science, or knowledge; progression in knowledge; improvement; adeptness; as, to acquire proficiency in music.
n 1: the quality of having great facility and competence
2: skillfulness in the command of fundamentals deriving from
practice and familiarity; "practice greatly improves
proficiency" [syn: technique]