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Necessary vs Requirement - What's the difference?

necessary | requirement |

As nouns the difference between necessary and requirement

is that necessary is (archaic|british) bathroom, toilet, loo while requirement is a necessity or prerequisite; something required or obligatory.

As an adjective necessary

is needed, required.

necessary

English

(wikipedia necessary)

Adjective

(en adjective)
  • needed, required
  • * Shakespeare
    • 'Tis necessary he should die.
  • * Tillotson
    • A certain kind of temper is necessary to the pleasure and quiet of our minds.
  • Such as must be; not to be avoided; inevitable.
  • * Shakespeare
    • Death, a necessary end, / Will come when it will come.
  • Acting from necessity or compulsion; involuntary.
    • Whether man is a necessary or a free agent is a question much discussed.

    Synonyms

    * (needed) See also * (such as must be) inevitable, natural

    Antonyms

    * (needed) unnecessary * (such as must be) evitable, incidental, impossible

    Derived terms

    * necessarily * necessary condition

    Related terms

    * necessariness * necessitate * necessitation * necessitousness * necessitude * necessity

    External links

    *

    Noun

    (necessaries)
  • (archaic, British) bathroom, toilet, loo

    • External links

    * *

    Statistics

    *

    requirement

    English

    (wikipedia requirement)

    Noun

    (en noun)
  • A necessity or prerequisite; something required or obligatory.
  • Something asked.
  • (engineering) A statement (in domain specific terms) which specifies a verifiable constraint on an implementation that it shall undeniably meet or (a)'' be deemed unacceptable, or ''(b)'' result in implementation failure, or ''(c) result in system failure.

    • Usage notes

    * Adjectives often used with "requirement": stringent, complex, reasonable, mandatory, important, financial, medical, educational, physical, chemical * Verbs often used with "requirement": meet, comply with, satisfy, fulfill, impose, waive, abolish, drop, add, remove, fail to meet, ignore, understand, state, specify, increase, reduce, change, modify

    Synonyms

    * (prerequisite) condition, prerequisite, necessity

    Derived terms

    * functional requirement * requirements engineering * requirements analysis

    External links

    *