overdraft

Short definition from Wiktionary

Noun

1. 1
   The act of overdrawing a bank account.
2. 2
   The amount overdrawn.
3. 3
   The maximum amount that may be overdrawn.
4. 4
   The extraction of groundwater from an aquifer beyond the safe yield or equilibrium yield.
5. 5
   A series of flues in a furnace; the current of air forced through them.

Verb

1. 1
   To extract groundwater from (an aquifer) beyond the safe yield or equilibrium yield.