Meanings
noundiesel exhaust fluid (countable and uncountable, plural diesel exhaust fluids)
plural diesel exhaust fluids
- countableuncountableautomotiveA liquid used to reduce controlled emissions from the exhaust of diesel engines.
Origin
From diesel exhaust + fluid. From being a liquid, which is a class of fluid, used for the treatment of the exhaust from diesel internal combustion engines.
Full word history & related roots →Cite this entry
APA
diesel exhaust fluid. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/diesel%20exhaust%20fluid
MLA
“diesel exhaust fluid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/diesel%20exhaust%20fluid. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “diesel exhaust fluid,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/diesel%20exhaust%20fluid.
Source: diesel exhaust fluid on Wiktionary, CC BY-SA 4.0.