What does 颠倒 (diāndǎo) mean in English?

Card 567HSK Level 4567/3571
CARD567
PROGRESS16%
颠倒
顛倒
diāndǎo
reversal; upend; bottom up(Verb)
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Reveal: Click/Space/Enter/↑↓/w/s/j/k•Navigate: ←→/h/l/a/d