Flowing is an adjective, and a gerund or present participle of a word "FLOW."
1. (Especially of long hair or clothing) hanging or draping loosely and gracefully.
1. (Of a liquid, gas, or electricity) move steadily and continuously in a current or stream.
2. Go from one place to another in a steady stream, typically in large numbers.
3. (Of a solid) undergo a permanent change of shape under stress, without melting.
Most glaciers have been retreating rather than flowing forward.