expert as in a person with special knowledge or ability who performs skillfully

expert as in having or showing knowledge and skill and aptitude

• "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"

Synonyms

• adepthaving or showing knowledge and skill and aptitude; someone who is dazzlingly skilled in any field
• good(often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well'); completely and absolutely (`good' is sometimes used informally for `thoroughly'); benefit; moral excellence or admirableness; that which is pleasing or valuable or useful; articles of commerce ; having desirable or positive qualities especially those suitable for a thing specified; having the normally expected amount; morally admirable ; deserving of esteem and respect; promoting or enhancing well-being; agreeable or pleasing; of moral excellence; having or showing knowledge and skill and aptitude; thorough; with or in a close or intimate relationship; financially safe; most suitable or right for a particular purpose; resulting favorably; exerting force or influence; capable of pleasing; appealing to the mind; in excellent physical condition; tending to promote physical well-being; not forged; not left to spoil; generally admired
• practicedhaving or showing knowledge and skill and aptitude; skillful after much practice
• proficienthaving or showing knowledge and skill and aptitude; of or relating to technique or proficiency in a practical skill
• skillfulhaving or showing knowledge and skill and aptitude; done with delicacy and skill
• skilfulhaving or showing knowledge and skill and aptitude

expert as in of or relating to or requiring special knowledge to be understood

• "technical terminology"
• "a technical report"
• "technical language"

Synonyms

• technicala pickup truck with a gun mounted on it ; (basketball) a foul that can be assessed on a player or a coach or a team for unsportsmanlike conduct; of or relating to technique or proficiency in a practical skill; characterizing or showing skill in or specialized knowledge of applied arts and sciences; of or relating to a practical subject that is organized according to scientific principles; relating to or concerned with machinery or tools; according to strict interpretation of the law or set of rules ; of or relating to or requiring special knowledge to be understood; resulting from or dependent on market factors rather than fundamental economic considerations