Main entry: expert
Definition: a person with special knowledge or ability who performs skillfully
Main entry: adept, skilful, skillful, expert, practiced, proficient, good
Definition: having or showing knowledge and skill and aptitude
Usage: adept in handicrafts; an adept juggler; an expert job; a good mechanic; a practiced marksman; a proficient engineer; a lesser-known but no less skillful composer; the effect was achieved by skillful retouching
Definition: of or relating to or requiring special knowledge to be understood
Usage: technical terminology; a technical report; technical language