What does sloughing mean?
Sloughing most commonly describes the shedding or casting off of dead skin, scales, or tissue. The image is especially familiar from snakes and other animals, while medical and veterinary writers use it for the loss of damaged tissue from a wound or body surface. Sloughing can also be figurative: people, organizations, or habits may slough off something unwanted, such as outdated practices or responsibilities. The verb is less common in the figurative sense than “shed,” and “slough off” is usually used for deliberate removal, whereas physical sloughing can be involuntary. A further, less frequent sense refers to becoming covered or clogged with mud. Although “slough” can also mean a marshy hollow, that noun is traditionally pronounced differently, and “sloughing” normally follows the /slaʊ/ pronunciation associated with shedding. The word is useful because it gives a vivid name both to a natural process of renewal and to the figurative clearing away of what has become burdensome.
The process of shedding or casting off a surface layer, especially dead skin, scales, or tissue.
"The sloughing of the snake's skin left its new markings visible."
Often used technically in medicine and biology; it is normally an uncountable process noun.
To shed or cast off a surface layer, or figuratively to discard something unwanted.
"The wound was sloughing dead tissue."
In physical contexts, the process may be involuntary. Figuratively, it usually appears in the construction “slough off.”
Shedding or casting off a surface layer, especially dead skin or damaged tissue.
"The clinician noted sloughing tissue around the wound."
Chiefly a technical medical or biological use, particularly in the phrase “sloughing tissue.”
Rare; “sloughing” is normally used as an uncountable process noun.
"The wound showed repeated sloughings of necrotic tissue."
A snake's dramatic skin shed is only the most visible example of sloughing, a word that also describes both damaged tissue falling away and old habits being cast aside.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sloughing come from?
Sloughing is the present participle and gerund of slough, “to shed or cast off.” The English verb is recorded from Middle English, especially in the familiar sense of a snake casting off its skin, and continues an Old English word associated with a slug or snail. A separate Old English word, slōh, meaning a muddy pool, underlies the marshy sense of slough and related forms such as sloughy.
How sloughing is actually used
The physical sense is especially common in medical, veterinary, and biological contexts. The figurative expression “slough off” often implies deliberately abandoning something outdated or burdensome. The verb normally has the /slaʊ/ pronunciation, although the unrelated or distinct noun meaning a marsh is traditionally pronounced /sluː/.
Easily confused with sloughing
Sloughing is the process of shedding a surface layer, whereas a slough is a marshy hollow or, in the spelling used for the verb's source, the act of casting off skin.