A meander in geography is a bend in a supple watercourse. It is created when the moving water in a stream wear away the outer banks and broaden its valley. A stream of any quantity may take up a meandering course.
1 Additional Answer
In geography, a meander in general is a bend in a sinuous watercourse. A meander is formed when the moving water in a river erodes the outer banks and widens its valley. A stream of any volume may assume a meandering course, alternatively eroding sediments from the outside of a bend and depositing them on the inside. The result is a snaking pattern as the stream meanders back and forth across its down valley axis.