overdraft (EN)

noun, verb

noun “overdraft”

1. a negative balance in a bank account caused by withdrawing more money than is available
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   After paying for unexpected repairs, he had an overdraft and his account showed a negative balance.
2. the maximum amount that can be overdrawn from a bank account
   His bank increased his overdraft to $1,500, giving him more flexibility in emergencies.
3. (in hydrology) the excessive extraction of groundwater beyond the aquifer's sustainable yield
   The town's water shortage is partly due to the overdraft of the underground water reserves for irrigation.
4. (in engineering) a passage or vent in a furnace that allows air to circulate
   The engineer adjusted the furnace's overdraft to improve fuel efficiency.

verb “overdraft”

1. (in hydrology) to extract groundwater from an aquifer beyond its sustainable capacity
   Due to the prolonged drought, the city had to overdraft the aquifer to meet water demands.