What is the meaning of Overdraft?

The act of overdrawing a bank account.

The amount overdrawn.

The maximum amount that may be overdrawn.

The extraction of groundwater from an aquifer beyond the safe yield or equilibrium yield.

A series of flues in a furnace; the current of air forced through them.

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

Source: wiktionary.org