Definition of "def"

In that case Wills, J., adopted a dictionary def of "Cowkeeper" as, "one whose business it is to keep cows," and added, "the business of a Cowkeeper is a special business of its own."

1903, F[rederick] Stroud, The Judicial Dictionary, […], 2nd edition, London: Sweet and Maxwell; Stevens and Sons, page 454

The Black Books also reflect [Philip Babcock] Gove's notoriously brusque manner, no doubt gained from an early career in the Navy. Memos begin, "Editorializing has no place in definitions," or "Godlove's psychophysical defs of color names and their references had better be regarded as sacrosanct." Sir, yes, sir!

2017, Kory Stamper, Word by Word: The Secret Life of Dictionaries, New York, N.Y.: Pantheon Books, page 104

And focus on cleaning the park. But we should def get waffle fries after.

2022 Barbie: It Takes Two episode 7 "Start Small" at 15 minutes, Malibu to Brooklyn

Not to toot our own horn, but we def had Austin Powers on VHS. This fun pop culture costume for couples may require some planning in advance to come up with these unique costumes, but trust us—it'll pay off!

2023 September 19, Chaise Sanders, “50 Best Halloween Costumes of All Time, From the Classics to the Truly Unique”, in Cosmopolitan‎

You real def. I'm gonna put you on stage.

1985, Ralph Farquhar, Krush Groove, spoken by Run (Joseph Simmons)

See I do this thing, so come pursue this king / One minor rhyme is all you just bring / Cause I’m the best I’m def, ask the rest they left

1988, “Run’s House”, in Tougher Than Leather, performed by Run-DMC

L.A.—The Second Deffest City of Hip-Hop [title]

1988 February 7, Carly Darling, “L.A.—The Second Deffest City of Hip-Hop”, in Los Angeles Times‎

I'm a Flavor Unit MC / And that means I'm one of the roughest, def-est, toughest, best-est

1993, “Bring The Flavor”, in Black Reign, performed by Queen Latifah