def
/dɛf/
def is the abbreviation of definition.
def is the abbreviation of deficit.
def is the clipping of definitely.
Meaning of definition
Noun
definition (countable and uncountable, plural definitions)
- A statement of the meaning of a word, word group, sign, or symbol; especially, a dictionary definition.
- Your definition of "elephant" needs to be more precise than "a big animal with large ears".
- A clear instance conforming to the dictionary or textbook definition.
- Baroque is a good game, but only for a very narrow subset of the gaming audience. It is the very definition of a niche title.2008 May, Shoeless Wayne Santos, “Baroque” (game review), GameAxis Unwired, Hardware Zone Pte, page 51
- A statement expressing the essential nature of something; formulation.
- The action or process of defining.
- The act of defining; determination of the limits.
- A product of defining.
Meaning of deficit
Noun
deficit (plural deficits)
- Deficiency in amount or quality; a falling short; lack.
- The crop output this year has been comparatively small, owing to the deficit in rainfall.
- A situation wherein, or amount whereby, spending exceeds (e.g. government) revenue.
- Dr. Beeching's obvious intent is that if Scottish—and similarly unprofitable English and Welsh—railways are to be maintained, it must be done by an unconcealed subsidy; he is determined that the railways shall no longer be preoccupied with—and derided for—immense deficits which include the burden...1962 October, “Talking of Trains: Passed to you, Mr. Macmillan”, in Modern Railways, page 220
Adjective
def (comparative deffer, superlative deffest)
- Excellent; very good.
- 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 left1988, “Run’s House”, in Tougher Than Leather, performed by Run-DMC
Noun capitalized: DEF
DEF (countable and uncountable, plural DEFs)
- Abbreviation of diesel exhaust fluid.
- Initialism of defence point.
- Initialism of daily electronic feed.
- Initialism of delayed electronic feed.
Synonyms of def
Forms of def
| Noun | |
|---|---|
| plural | defs |
| plural | DEFs |
| Adjective | |
| comparative | deffer |
| superlative | deffest |
Origin of def
Clipping of definitive or definitely; alternatively an eye spelling of death referring to an absolute.
Words formed from def
Words that rhyme with def
Questions about def
- What does def mean?
- Def means excellent; very good.
- What is def the abbreviation of?
- Def is the abbreviation of definition.
- What part of speech is def?
- Def can be an adjective or a noun.
- How do you pronounce def?
- Def is pronounced /dɛf/.
Words near def in the dictionary
Source and license
Adapted from Wiktionary: def (page history and authors); DEF (page history and authors); definition (page history and authors); deficit (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: En-au-def.ogg.
Cite this entry: “def.” Word.ws, https://word.ws/def. Based on Wiktionary, CC BY-SA 4.0.
