leakage

Short definition from Wiktionary

Noun

1. 1
   An act of leaking, or something that leaks.
2. 2
   The amount lost due to a leak.
3. 3
   An undesirable flow of electric current through insulation.
4. 4
   Loss of retail stock, especially due to theft.
5. 5
   The situation where sound is picked up by a microphone from a source other than that which is intended.
6. 6
   The loss of revenue generated by tourism to the economies of other countries.