Those leaving the Armed Forces or Civil Service for any reason. Those who rejoin and then leave again will be counted twice if the time period includes both exit dates.

the unwanted discharge of a fluid from some container; "they tried to stop the escape of gas from the damaged pipe"; "he had to clean up the leak"

Water discharged from a power plant.

Where a lake discharges, or where water exits a lake.

current exiting through a strait or passage.