DEF Definition & Meaning - Merriam-Webster
Feb 24, 2026 · The meaning of DEF is definitely. How to use def in a sentence.
Diesel exhaust fluid - Wikipedia
Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue[3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an …
Meanings & Definitions of English Words | Dictionary.com
23 hours ago · The world's leading online dictionary: English definitions, synonyms, word origins, example sentences, word games, and more. A trusted authority for 25+ years!
What Is DEF and How Does It Work? - MotorTrend
Jul 29, 2024 · Diesel exhaust fluid, or DEF, is a key component in lowering pollutants emitted from diesel engines, helping to improve efficiency and reduce emissions.
DEF | definition in the Cambridge English Dictionary
DEF meaning: 1. very good: 2. very good: . Learn more.
def - Wiktionary, the free dictionary
Jun 14, 2026 · Failing to see the word's antecedents, I suspected that def was either bogus or an orphan, lost to its slang ancestors through mispronunciation or misspelling […]
Def - definition of def by The Free Dictionary
def Also found in: Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia.
DEF Definition & Meaning | Dictionary.com
DEF definition: definitely. See examples of def used in a sentence.
DEF | English meaning - Cambridge Dictionary
DEF definition: 1. very good: 2. very good: . Learn more.
DEF, DPF, and SCR: What Every Diesel Driver Needs to Know in 2026
Apr 24, 2026 · DEF stands for diesel exhaust fluid. It is a solution of urea and deionized water, mixed at a ratio of roughly 32.5 percent urea to 67.5 percent water. It is not a fuel additive. It is not mixed into …