What does source mean in geography?

Answer 1

This is where the water bubbles up from the ground and creates a river or this is where the river starts. The Source and River Mouth are basically the same thing, they both start the rivers off, as you can tell my the 'Mouth' bit in the word 'River Mouth'.

Answer 2

In geography, "source" usually refers to the point where a river or stream begins, typically in the form of a spring or high-altitude area where water originates. It is significant because the characteristics of the source can influence the entire river system downstream.