Taught by use, practice, or experience, experienced; having facility of operation or performance from practice; knowing and ready from much practice; clever; skillful; as, an expert surgeon; expert in chess or archery.(adjective)
source: webster1913
noun (n)
a person with special knowledge or ability who performs skillfully(noun.person)
source: wordnet30
An expert or experienced person; one instructed by experience; one who has skill, experience, or extensive knowledge in his calling or in any special branch of learning.(noun)
source: webster1913
adjective satellite (s)
having or showing knowledge and skill and aptitude(adj.all)