What does 保密 (bǎo mì) mean in English?

Card 54HSK 2010 Level 654/2512
CARD54
PROGRESS2%
保密
bǎo mì
to keep sth confidential; to maintain secrecy

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