Online Google Dictionary

necessary 中文解釋 wordnet sense Collocation Usage Collins Definition
Adjective
/ˈnesəˌserē/,
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Required to be done, achieved, or present; needed; essential,
  1. Required to be done, achieved, or present; needed; essential
    • - members are admitted only after they have gained the necessary experience
    • - it's not necessary for you to be here
  2. Determined, existing, or happening by natural laws or predestination; inevitable
    • - a necessary consequence
  3. (of a concept, statement, judgment, etc.) Inevitably resulting from or produced by the nature of things, so that the contrary is impossible

  4. (of an agent) Having no independent volition

Noun
  1. The basic requirements of life, such as food and warmth

  2. Small items required for a particular journey or purpose
    • - I hastily threw a few necessaries into a kit bag
  1. absolutely essential
  2. necessity: anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained"
  3. unavoidably determined by prior circumstances; "the necessary consequences of one's actions"
  4. (necessarily) in an essential manner; "such expenses are necessarily incurred"
  5. Modal logic is a type of formal logic that extends the standards of formal logic to include the elements of modality (for example, possibility and necessity). Modals qualify the truth of a judgment. ...
  6. "Necessary" is a song by Japanese j-pop group Every Little Thing, released as their tenth single on September 30, 1998.
  7. House of Fools is a rock band from Greensboro, North Carolina. Members include Josh King (vocals/acoustic guitar), David McLaughlin (guitar/backing vocals), Joel Kiser (guitar), Matt Bowers (keyboard), Jordan Powers (ex- Far-Less) (bass) and Jack Foster (drums).
  8. bathroom, toilet, loo; needed, required
  9. (necessaries) necessary or indispensable items
  10. (Necessaries) Basic items needed to maintain a standard of living.
  11. (Necessaries) Items of clothing issued to a soldier other than his uniform, such as shirts, stockings, shoes and trousers.
  12. (Necessaries) The common law doctrine that if a person who owes another person the duty of support and fails to support such person, he becomes liable to third parties who provide necessaries such as the grocer and utility company to person owed a duty of support..
  13. (necessaries) Goods and services that are essential to a minor's health and welfare.
  14. (necessaries) Goods suitable to the condition in life of an infant or minor or other person and to his actual requirements at the time of the sale and delivery.
  15. (necessaries) The basic requirements for a reasonable lifestyle, e.g. food, clothes, housing, etc.
  16. (necessaries) staple goods, such as sugar, salt, coffee
  17. niedbehefe; niedbeðearf
  18. The little blue porta-potties/outhouses/chemical toilets found at reenactments.  "The necessary" was actually a period term for outhouse.  Also called Comfort Station, Hooters, Irish Shanty, Officer's Quarters, and Our Lady of the Blue Waters.
  19. A sentence, proposition thought, or judgement is necessary if it is true of any possible world. Some philosophers (e.g. A.J. ...
  20. and sufficient minimal set of modeling concepts to cover the representation scope of a modeling framework on the most abstract level (on the level that corresponds to the first order propositions in Russell's Theory of Types).
  21. modal logic: must exist in all possible worlds. Impossible to not be the case, things could not be otherwise. See also contingent.
  22. Essential, indispensable, requisite, required.
  23. (1) In logic, any statement whose denial would involve a contradiction. (2) In ontology, the quality of a being that is eternal and needs nothing else to exist or continue to exist.
  24. What must be the case, as opposed to the merely possible (what might be the case) and the merely actual (what is the case). ...
  25. (as in “necessary war”) – not really that necessary, at least when it comes to backing up your words with required manpower and funding and standing up to your liberal base.