1 The surgical removal of body tissue.
2 The removal of snow and ice from a glacier or iceberg by melting or evaporation.
2.1 The erosion of rock, typically by wind action.
2.2 The loss of surface material from a spacecraft or meteorite through evaporation or melting caused by friction with the atmosphere.
Late Middle English (in the general sense ‘taking away, removal’): from late Latin ablatio(n-), from Latin ablat- ‘taken away’, from ab- ‘away’ + lat- ‘carried’ (from the verb ferre).
The scientists at National Aeronautics and Space Administration came to understand the nature of ablation when they observed it’s effects on returning lander modules.