What does 开刀 (kāidāo) mean in English?

Card 40NPCR Level 1240/49
CARD40
PROGRESS82%
开刀
開刀
kāidāo
have an operation(Verb plus Object)
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Reveal: Click/Space/Enter/↑↓/w/s/j/k•Navigate: ←→/h/l/a/d