modality

/moh dal"i tee/, n., pl. modalities.
1. the quality or state of being modal.
2. an attribute or circumstance that denotes mode or manner.
3. Also called mode. Logic. the classification of propositions according to whether they are contingently true or false, possible, impossible, or necessary.
4. Med. the application of a therapeutic agent, usually a physical therapeutic agent.
5. one of the primary forms of sensation, as vision or touch.
[1610-20; < ML modalitas. See MODAL, -ITY]

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logic
 in logic, the classification of logical propositions according to their asserting or denying the possibility, impossibility, contingency, or necessity of their content. Modal logic, which studies the logical features of such concepts, originated with Aristotle, was extensively studied by logicians in antiquity and the European Middle Ages, and, for the most part, was neglected after the Renaissance until revived in modern mathematical logic. The basic statement on this subject, presupposed in most contemporary discussions, is by C.I. Lewis and Cooper Harold Langford in Symbolic Logic (1932), which develops a modal system of “strict implication” for interpreting the logical force of “if . . . then.”

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Universalium. 2010.

Look at other dictionaries:

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  • Modality — Mo*dal i*ty, n. [Cf. F. modalit[ e].] 1. The quality or state of being modal. [1913 Webster] 2. (Logic & Metaph.) A modal relation or quality; a mode or point of view under which an object presents itself to the mind. According to Kant, the… …   The Collaborative International Dictionary of English

  • modality — (n.) 1610s, from O.Fr. modalité or directly from M.L. modalitatem (nom. modalitas) a being modal, from modalis (see MODAL (Cf. modal)). Related: Modalities …   Etymology dictionary

  • modality — [mō dal′ə tē] n. pl. modalities [ML modalitas] 1. the fact, state, or quality of being modal 2. a special attribute, emphasis, etc. that marks certain individuals, things, groups, etc. 3. Logic the qualification in a proposition that indicates… …   English World dictionary

  • modality — 1. A form of application or employment of a therapeutic agent or regimen. 2. Various forms of sensation, e.g., touch, vision, etc.. [Mediev. L. modalitas, fr. L. modus, a mode] * * * mo·dal·i·ty mō dal ət ē n …   Medical dictionary

  • modality — n. 1) a form of sensation, such as smell, hearing, tasting, or detecting temperature. Differences in modality are not due to differences in the structure of the nerves concerned, but to differences in the working of the sensory receptors and the… …   The new mediacal dictionary

  • modality — The modality of a proposition is the way in which it is true or false. The most important division is between propositions true of necessity, and those true as things are: necessary as opposed to contingent propositions. Other qualifiers… …   Philosophy dictionary

  • modality — modal ► ADJECTIVE 1) relating to mode or form as opposed to substance. 2) Grammar relating to the mood of a verb. 3) Music using melodies or harmonies based on modes other than the ordinary major and minor scales. DERIVATIVES modality noun… …   English terms dictionary

  • modality — noun (plural ties) Date: 1545 1. a. the quality or state of being modal b. a modal quality or attribute ; form 2. the classification of logical propositions according to their asserting or denying the possibility, impossibility, contingency, or… …   New Collegiate Dictionary

  • modality — noun a) the state of being modal b) the classification of propositions on the basis on whether they claim possibility, impossibility, contingency or necessity; mode …   Wiktionary

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