What does 熟练 (shú liàn) mean in English?

Card 901HSK 2010 Level 5901/1311
CARD901
PROGRESS69%
熟练
熟練
shú liàn
practiced; proficient; skilled; skillful

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d