What does rancidness mean?
Rancidness is the condition of being rancid: having a strong, unpleasant smell or taste that develops when fats or oils deteriorate, often because of oxidation or microbial activity. It is especially associated with butter, lard, oils, and other stored food products, and can indicate that the substance is no longer safe or suitable to eat. The word is generally used in British and American English and is usually uncountable, though the related adjective rancid is more common in ordinary descriptions. Rancidness differs from rancidity in emphasis: rancidity often names the state or quality itself, while rancidness can likewise refer to the characteristic smell or taste associated with spoiled fats. Both words make a bad condition unmistakable through the strong sensory impression of rancidity.
nounThe state or quality of being rancid, especially an unpleasant smell or taste caused by the deterioration of fats or oils.
- The state or quality of being rancid, especially an unpleasant smell or taste caused by the deterioration of fats or oils.
"The rancidness of the old butter made it unusable."
"A faint rancidness in the kitchen revealed that the oil had been stored for too long."
"The chemist identified the rancidness of the sample by its sharply offensive odor."
The noun is normally uncountable; the plural form is rare.
"The rancidnesses of several old cooking oils were noted by the inspector."
Rancidness is the unmistakable sign that fats and oils have begun to spoil.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does rancidness come from?
The word dates from the early 16th century and comes through French rancide from Latin rancidus, meaning stinking or rancid. Its development is associated with the sense of a bad smell arising from decomposed or oxidized fats. The related English words rancid, rancidity, rancor, and rancorous reflect the same broader Latin family of ideas connected with rancidity and unpleasantness.
Related word forms
How rancidness is actually used
Usually uncountable and somewhat formal in modern use; rancid is more common when describing food or substances.
Easily confused with rancidness
Rancidness describes an unpleasant smell or taste caused by deterioration, whereas rancorous describes deep or bitter resentment.