overdraft

noun

1. (uncountable)The act of overdrawing a bank account.
2. (countable)The amount overdrawn.

   “I have an overdraft of £1234.”

3. (countable)The maximum amount that may be overdrawn.

   “The bank have given me an overdraft of $2000.”

4. (countable, uncountable)The extraction of groundwater from an aquifer beyond the safe yield or equilibrium yield.
5. (countable, uncountable)A series of flues in a furnace; the current of air forced through them.

verb

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