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  1. DEF Definition & Meaning - Merriam-Webster

    The meaning of DEF is definitely. How to use def in a sentence.

  2. 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 …

  3. Merriam-Webster: America's Most Trusted Dictionary

    Merriam-Webster's Dictionary - America's Most Trusted Dictionary, with articles, reviews, word suggestions, and more.

  4. DEF Definition & Meaning | Dictionary.com

    DEF definition: definitely. See examples of def used in a sentence.

  5. def - Wiktionary, the free dictionary

    Feb 28, 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 […]

  6. DEF definition and meaning | Collins English Dictionary

    8 meanings: slang very good, esp of hip-hop definition → 1. a formal and concise statement of the meaning of a word, phrase,.... Click for more definitions.

  7. Def - definition of def by The Free Dictionary

    Simmons' Def Jam has demonstrated a clear ability to maintain its leadership position as the premier rap label in the music business--a plus in the eyes of the investment community.

  8. 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.

  9. DEF | definition in the Cambridge English Dictionary

    DEF meaning: 1. very good: 2. very good: . Learn more.

  10. Def Leppard | Official Website

    The official site of Def Leppard. Get the latest tour dates, music, news, merchandise and more.