necessary

necessary
nec•es•sar•y
[[t]ˈnɛs əˌsɛr i[/t]] adj. n. pl. -sar•ies
1) essential, indispensable, or requisite:
a necessary part of the motor[/ex]
2) cvb happening or existing by necessity; unavoidable:
a necessary change in our plans[/ex]
3) acting or proceeding from compulsion or necessity; involuntary
4) pho logic
a) (of a proposition) such that a denial of it involves a self-contradiction
b) (of an inference or argument) such that its conclusion cannot be false if its supporting premises are true
c) (of a condition) such that it must exist if a given event is to occur or a given thing is to exist
Compare sufficient 2)
5) something necessary or requisite; necessity
6) dial. Chiefly New Eng. a privy or toilet
•
Etymology: 1300–50; ME < L necessārius unavoidable, inevitable, needful nec′es•sar`i•ness, n. syn: necessary, requisite, indispensable, essential indicate something that cannot be done without. necessary refers to something needed for existence, for proper functioning, or for a particular purpose: Food is necessary for life. Sugar is a necessary ingredient in this recipe. requisite refers to something required for a particular purpose or by particular circumstances: She has the requisite qualifications for the job. indispensable means absolutely necessary to achieve a particular purpose or to complete or perfect a unit: He made himself indispensable in the laboratory. essential refers to something that is part of the basic nature or character of a thing and is vital to its existence or functioning: Water is essential to life.

From formal English to slang. 2014.

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Synonyms:
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Look at other dictionaries:

  • necessary — I (inescapable) adjective avoidless, certain, choiceless, compelling, constraining, decided, decreed, designated, destined, expected, fated, fateful, fixed, foreordained, imminent, impending, ineluctable, includible, inevitable, inexorable,… …   Law dictionary

  • Necessary — Nec es*sa*ry, a. [L. necessarius, from necesse unavoidable, necessary; of uncertain origin: cf. F. n[ e]cessaire.] 1. Such as must be; impossible to be otherwise; not to be avoided; inevitable. [1913 Webster] Death, a necessary end, Will come… …   The Collaborative International Dictionary of English

  • necessary — [nes′ə ser΄ē] adj. [ME < L necessarius < necesse, unavoidable, necessary < ne , not + cedere, to give way: see CEDE] 1. that cannot be dispensed with; essential; indispensable [the nutriments necessary to life] 2. resulting from… …   English World dictionary

  • Necessary — may refer to: Something that is a required condition for something else to be the case, see necessary and sufficient condition. A necessary truth, something that cannot fail to be true, see logical possibility. An important task or essential… …   Wikipedia

  • necessary — ► ADJECTIVE 1) required to be done, achieved, or present; needed. 2) that must be; inevitable: a necessary result. ► NOUN 1) (necessaries) the basic requirements of life, such as food and warmth. 2) (the necessary) informal the action, item, or… …   English terms dictionary

  • Necessary — Nec es*sa*ry, n.; pl. {Necessaries}. 1. A thing that is necessary or indispensable to some purpose; something that one can not do without; a requisite; an essential; used chiefly in the plural; as, the necessaries of life. [1913 Webster] 2. A… …   The Collaborative International Dictionary of English

  • necessary — [adj1] essential all important, basic, binding, bottom line*, cardinal, chief, compelling, compulsory, crucial, decisive, de rigueur*, elementary, exigent, expedient, fundamental, imperative, incumbent on, indispensable, mandatory, momentous,… …   New thesaurus

  • necessary — necessary/contingent truths …   Philosophy dictionary

  • necessary — 1 *needful, requisite, indispensable, essential Analogous words: compelling or compulsory, obliging or obligatory, constraining (see corresponding verbs at FORCE): important, significant, momentous (see corresponding nouns at IMPORTANCE):… …   New Dictionary of Synonyms

  • necessary — ne|ces|sa|ry1 W1S1 [ˈnesısəri US seri] adj [Date: 1300 1400; : Latin; Origin: necessarius, from necesse necessary , from ne not + cedere to give up ] 1.) something that is necessary is what you need to have or need to do →↑essential ▪ The booklet …   Dictionary of contemporary English

  • necessary — 1 adjective 1 something that is necessary is what you need to have or need to do; essential: I ll leave it to you to make all the necessary arrangements. (+ for): Food is necessary for life. | it is necessary (for sb) to do sth: It s not… …   Longman dictionary of contemporary English

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