What does degreasing mean?
Degreasing is the process of removing grease, oil, wax, or other fatty residues from surfaces, objects, or materials. It is an essential step in many practical domains: mechanics degrease engine parts before repair, manufacturers degrease metal components before painting or welding so that coatings and joints adhere properly, and cooks degrease pans, ovens, and broths to cut excess fat. The task is usually accomplished with detergents, solvents, steam, or heat, depending on the setting and sensitivity of the material involved. As a noun, degreasing names the process itself ('the parts require degreasing'); as the -ing form of the verb 'degrease', it describes the ongoing action. The word carries no strong emotional connotation — it is a workaday, technical term — yet it points to a genuinely important principle in both industry and domestic life: that clean, grease-free surfaces are a prerequisite for durability, safety, and quality in countless tasks.
The action or process of removing grease, oil, or fatty residue from something, typically using a solvent, detergent, or heat.
"Regular degreasing of the kitchen exhaust hood prevents dangerous grease buildup."
Often used in technical and industrial contexts, and commonly modified by adjectives such as 'thorough', 'industrial', or 'chemical'.
Present participle and gerund of 'degrease': to remove grease, oil, or fat from a surface or substance.
"He spent the afternoon degreasing the bicycle chain and gears."
Before painting a car or welding metal, every trace of grease must go — skip the degreasing and even the best paint will peel right off.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of degreasing
Degreasing derives from the verb 'degrease', formed by attaching the prefix 'de-' (indicating removal or reversal) to 'grease'. 'Grease' entered English from Old French 'graisse', which traces back through Vulgar Latin to the Latin adjective 'crassus', meaning 'fat' or 'thick'. English speakers began combining 'de-' with existing verbs extensively in later centuries, giving rise to practical compounds like degrease alongside similar formations such as defrost and dehumidify. Cognates sharing the same Latin root include the adjective 'crass' in English.
Related word forms
How degreasing is actually used
Primarily a technical and industrial term, common in contexts such as automotive repair, manufacturing, metalworking, food preparation, and household cleaning. It is neutral in register — neither slangy nor especially formal — though it appears more frequently in written technical documentation than everyday conversation.
Easily confused with degreasing
Greasing means applying grease or lubricant, whereas degreasing means removing it.
Decreasing refers to becoming smaller or fewer in amount, while degreasing specifically concerns the removal of grease; the words differ only by one letter in spelling but not in meaning.