Definition from Wiktionary, the free dictionary
Audio (US) (file)
- To remove the leaves from a plant.
- To remove a layer of skin, as in cosmetic preparation.
- (mineralogy) To split into scales, especially to become converted into scales as the result of heat or decomposition.
Derived terms 
to remove a layer of skin, as in cosmetic preparation
- second-person plural present active imperative of exfōliō