Dry drowning is defined as -
Drowning in sea water
Drowning in cold water, death due to cardiac arrest
Drowning in a dehydrated body
Drowning where death is due to laryngospasm
Dry drowning: On contact with water, especially cold water, there results in intense laryngospasm, so that water does not enter the lungs.
Death is due to asphyxia because of laryngospasm.