necessary

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UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈnɛsəsəri/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈnɛsəˌsɛri/ ,USA pronunciation: respelling(nesə ser′ē)

Inflections of 'necessary' (nnoun: Refers to person, place, thing, quality, etc.): nplplural noun: Noun always used in plural form--for example, "jeans," "scissors.": necessaries

WordReference Random House Learner's Dictionary of American English © 2020
nec•es•sar•y /ˈnɛsəˌsɛri/USA pronunciation   adj. 
  1. essential;
    needed;
    unavoidable:a small but necessary change in our plans.[It + be + ~ + that clause]:It is necessary that you stay until the end of the meeting.[It + be + ~ (+ for + object) + to + verb]It isn't necessary (for you) to stay.
    necessary is an adjective, necessity is a noun, necessitate is a verb:He carried only what was necessary for survival. He carried a few necessities with him. The invasion necessitates a quick response on our part.

WordReference Random House Unabridged Dictionary of American English © 2020
nec•es•sar•y  (nesə ser′ē),USA pronunciation adj., n., pl.  -sar•ies. 
adj. 
  1. being essential, indispensable, or requisite:a necessary part of the motor.
  2. happening or existing by necessity:a necessary change in our plans.
  3. acting or proceeding from compulsion or necessity;
    not free;
    involuntary:a necessary agent.
  4. Philosophy[Logic.]
    • (of a proposition) such that a denial of it involves a self-contradiction.
    • (of an inference or argument) such that its conclusion cannot be false if its supporting premises are true.
    • (of a condition) such that it must exist if a given event is to occur or a given thing is to exist. Cf.  sufficient (def. 2).

n. 
  1. something necessary or requisite;
    necessity.
  2. Lawnecessaries, food, clothing, etc., required by a dependent or incompetent and varying with his or her social or economic position or that of the person upon whom he or she is dependent.
  3. Dialect Terms[Chiefly New Eng.]a privy or toilet.
neces•sar′i•ness, n. 
  • Latin necessārius unavoidable, inevitable, needful, equivalent. to necess(e) (neuter indeclinable adjective, adjectival) unavoidable, necessary + -ārius -ary
  • Middle English necessarie 1300–50
    • 1.See corresponding entry in Unabridged required, needed.
      Necessary, essential, indispensable, requisite indicate something vital for the fulfillment of a need.
      Necessary applies to that without which a condition cannot be fulfilled or to an inevitable consequence of certain events, conditions, etc.:Food is necessary to life. Multiplicity is a necessary result of division.Indispensable applies to something that cannot be done without or removed from the rest of a unitary condition:Food is indispensable to living things. He made himself indispensable as a companion.That which is
      essential forms a vitally necessary condition of something:Air is essential to red-blooded animals. It is essential to understand the matter clearly.Requisite applies to what is thought necessary to fill out, complete, or perfect something:She had all the requisite qualifications for a position.
    • 5.See corresponding entry in Unabridged requirement, requisite, essential.
    • 1.See corresponding entry in Unabridged dispensable.

Collins Concise English Dictionary © HarperCollins Publishers::
necessary /ˈnɛsɪsərɪ/ adj
  1. needed to achieve a certain desired effect or result; required
  2. resulting from necessity; inevitable: the necessary consequences of your action
  3. (of a statement, formula, etc) true under all interpretations or in all possible circumstances
  4. (of a proposition) determined to be true by its meaning, so that its denial would be self-contradictory
  5. (of a condition) entailed by the truth of some statement or the obtaining of some state of affairs
    Compare sufficient
  6. rare compelled, as by necessity or law; not free
n
  1. the necessaryinformal the money required for a particular purpose
  2. do the necessaryinformal to do something that is necessary in a particular situation

See also necessariesEtymology: 14th Century: from Latin necessārius indispensable, from necesse unavoidable
'necessary' also found in these entries:
Collocations: [common, shared, public, basic, fundamental] necessaries, is [never, not always] necessary, necessaries like [food, water, shelter], more...

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