| Term: | Glacial retreat |
| Definition: | Glacial retreat is the net movement of the glacier terminus upvalley. Retreat results when the glacier is ablating at a rate faster than its movement downvalley. Retreating termini are usually concave in shape. |
| Term: | Glacial retreat |
| Definition: | When the position of a mountain glacier's terminus is farther upvalley than before; occurs when a glacier ablates more material at its terminus than it transports into that region. |
| Term: | Glacial retreat |
| Definition: | The backwards movement of the snout of a glacier. |