Definition of ablation noun from the Oxford Advanced Learner's Dictionary



BrE BrE//əˈbleɪʃn//
; NAmE NAmE//əˈbleɪʃn//
[uncountable] (geology)
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the loss of material from a large mass of ice, snow or rock as a result of the action of the sun, wind or rain Word Originlate 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).
See the Oxford Advanced American Dictionary entry: ablation