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

1 day ago · Spell your way past the fork in the road. The world's leading online dictionary: English definitions, synonyms, word origins, example sentences, word games, and more. A trusted authority …

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

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 …

5 days ago · The meaning of DEFINITION is a statement of the meaning of a word or word group or a sign or symbol. How to use definition in a sentence.

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 […]

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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.

Reduce emissions and keep your diesel vehicle running clean with diesel exhaust fluid (DEF) from AutoZone. We sell the best brands, including AutoZone, Lumax, and Peak Blue DEF fluid.