noun.
A dead-end channel extending from the main stream of a river.
noun.
A streambed filled with water only in the rainy season.
noun.
A stagnant pool or backwater.
The Century Dictionary and Cyclopedia
noun.
In Australia, a stream which flows away from the main stream (in some cases returning to it at a farther point); an effluent. Also billibong, billybong.
the GNU version of the Collaborative International Dictionary of English
noun.
In Australia, a blind channel leading out from a river; -- sometimes called an anabranch. This is the sense of the word as used in the Public Works Department; but the term has also been locally applied to mere back-waters forming stagnant pools and to certain water channels arising from a source.