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Define vs Null - What's the difference?

define | null |

In mathematics terms the difference between define and null

is that define is to establish the referent of a term or notation while null is of or comprising a value of precisely zero.

As verbs the difference between define and null

is that define is to determine with precision; to mark out with distinctness; to ascertain or exhibit clearly while null is to nullify; to annul.

As nouns the difference between define and null

is that define is a kind of macro in source code that replaces one text string with another wherever it occurs while null is a non-existent or empty value or set of values.

As an adjective null is

having no validity, "null and void.

define

English

(Definition)

Verb

(defin)
  • To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly.
  • * Sir (Isaac Newton)
  • Ringsvery distinct and well defined .
  • *{{quote-magazine, year=2013, month=July-August, author= Lee S. Langston
  • , title= The Adaptable Gas Turbine , passage=Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo'', meaning ''vortex , and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.}}
  • (obsolete) To settle, decide (an argument etc.).
  • * 1596 , (Edmund Spenser), (The Faerie Queene) , IV.3:
  • These warlike Champions, all in armour shine, / Assembled were in field the chalenge to define .
  • To express the essential nature of something.
  • *{{quote-magazine, year=2013, month=May-June, author=
  • , volume=101, issue=3, page=178, magazine=(American Scientist) , title= Crinkly Curves , passage=Cantor defined a one-to-one correspondence between the points of the square and the points of the line segment. Every point in the square was associated with a single point in the segment; every point in the segment was matched with a unique point in the square.}}
  • To state the meaning of a word, phrase, sign, or symbol.
  • To describe, explain, or make definite and clear.
  • To demark sharply the outlines or limits of an area or concept.
  • *{{quote-magazine, year=2012, month=March-April, author=(Jan Sapp)
  • , volume=100, issue=2, page=164, magazine=(American Scientist) , title= Race Finished , passage=Few concepts are as emotionally charged as that of race. The word conjures up a mixture of associations—culture, ethnicity, genetics, subjugation, exclusion and persecution. But is the tragic history of efforts to define groups of people by race really a matter of the misuse of science, the abuse of a valid biological concept?}}
  • (mathematics) To establish the referent of a term or notation.
  • Derived terms

    * definable * definer

    Noun

    (en noun)
  • (computing, programming) A kind of macro in source code that replaces one text string with another wherever it occurs.
  • * 1996 , James Gosling, Henry McGilton, The Java Language Environment
  • From the computer programming perspective, Java looks like C and C++ while discarding the overwhelming complexities of those languages, such as typedefs, defines , preprocessor, unions, pointers, and multiple inheritance.
  • * 1999 , Ian Joyner, Objects unencapsulated: Java, Eiffel, and C++ (page 309)
  • Anyone who has attempted to do OO programming in a conventional language using defines will find out that it is impossible to realize the benefits easily, if at all, without compiler support.

    Anagrams

    * ----

    null

    English

    Noun

    (en noun)
  • A non-existent or empty value or set of values.
  • Zero]] quantity of [[expression, expressions; nothing.
  • (Francis Bacon)
  • Something that has no force or meaning.
  • (computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
  • (computing) the attribute of an entity that has no valid value.
  • Since no date of birth was entered for the patient, his age is null .
  • One of the beads in nulled work.
  • (statistics) null hypothesis
  • Adjective

    (en adjective)
  • Having no validity, "null and void"
  • insignificant
  • * 1924 , Marcel Proust, Within a Budding Grove :
  • In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.
  • absent or non-existent
  • (mathematics) of the null set
  • (mathematics) of or comprising a value of precisely zero
  • (genetics, of a mutation) causing a complete loss of gene function, amorphic.
  • Derived terms

    * nullity

    Verb

    (en verb)
  • to nullify; to annul
  • (Milton)

    See also

    * nil ----