Any outward movement.
Something that flows out of a sewage treatment plant.
The process of flowing out.
A fluid that flows out.
A stream of gaseous material emanating from an active galactic nucleus.
The part of a system that allows material to flow out.
To flow outward.
A random or sudden outburst (of activity).
An explosive event during a volcanic eruption.
A sudden recurrence of a disease, such as a seizure or a coughing fit.