One fully skilled or well versed in anything; a proficient
"After months of practice, she became adept at juggling three balls simultaneously without dropping any."
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"
Well skilled; completely versed; thoroughly proficient
"The young violinist was so adept at playing complex concertos that she captivated the entire audience from her first note."