What does 彻底 (chè dǐ) mean in English?

Card 103HSK 2010 Level 5103/1311
CARD103
PROGRESS8%
彻底
徹底
chè dǐ
thorough; thoroughly; complete

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