A fluid that flows out.
Any outward movement.
Something that flows out of a sewage treatment plant.
The process of flowing 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 narrow channel of water connecting two larger bodies of water.
A narrow pass, passage or street.
A difficult position.
A neck of land; an isthmus.