2. (adj)adept, expert, good, practiced, proficient, skillful, skilful having or showingknowledge 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"
3. (adj)technical, expert of or relating to or requiring specialknowledge to be understood
"technical terminology"; "a technical report"; "technical language"