Definition of "overdraft"

(uncountable) The act of overdrawing a bank account.  examples

(countable) The amount overdrawn.  examples

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

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

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

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