What does 开垦 (kāikěn) mean in English?

Card 1448HSK Level 41448/3571
CARD1448
PROGRESS41%
开垦
開墾
kāikěn
reclaim(Verb)
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Reveal: Click/Space/Enter/↑↓/w/s/j/k•Navigate: ←→/h/l/a/d