DEF meaning in Space Science ?

Answer: What is Definition mean?

A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols). Definitions can be classified into two large categories, intensional definitions (which try to give the sense of a term) and extensional definitions (which try to list the objects that a term describes). Another important category of definitions is the class of ostensive definitions, which convey the meaning of a term by pointing out examples. A term may have many different senses and multiple meanings, and thus require multiple definitions.

In mathematics, a definition is used to give a precise meaning to a new term, by describing a condition which unambiguously qualifies what a mathematical term is and is not. Definitions and axioms form the basis on which all of modern mathematics is to be constructed.

reference

Full Form	Category
Daily Electronic Feed	Academic & Science
Diamond Empowerment Fund	Business
Diesel Exhaust Fluid	Business
Defense Entrepreneurs Forum	Community
Days End Farm	Community
Default	Computing
Direct Equipment Failure	Computing
Data Element Framework	Computing
Digital Empowerment Foundation	Computing
DEFFECT	Cryptocurrency
Design Exchange Format	File Type
Geoworks Esp Assembly Header File	File Type
Smartware Ii Data Definition	File Type
Defaults - Definitions	File Type
Tlink - Wlink Linker Definition File	File Type
Deutsch Englische Freundschaft	General
Dungeon Enemies and Fate	General
Dog Egg Federation	General
Drengin Elite Fleet	General
Double Exhaust Filter	General
Dynamic Efficiency And Fidelity	General
Dutch Elite Force	General
Data Exchange Framework	General
Delta Echo Force	General
Defeated Example For	General
Door Edge Film	General
Diesel Exhaust Filter	General
Driver Education Foundation	General
Defroster	General
Diesel Emissions Fluid	General
Defile	Governmental
Definite	Maths
Defecation	Medical
Deferred	Medical
Deficient	Medical
Deaf	Medical
Development and Evaluation Facility	Military and Defence
Definition	Space Science
Defend	Sports
Defender	Sports