英和和英

語源

From Old French positif, from Latin positivus, from the past participle stem of ponere (“to place”). Compare posit.

発音

• (General American) enPR: pŏzʹĭ-tĭv, IPA: /ˈpɑzɪtɪv/, /-ɾɪv/
• (Indic) IPA: /ˈpɒzɨtɪv/
• ハイフネーション (英国発音): pos‧it‧ive, (米国発音): pos‧i‧tive
• 韻: -ɒzɪtɪv

形容詞

positive (comparative more positive, superlative most positive)

1. Included, present, characterized by affirmation.
2. (law) Formally laid down. [from the 14th c.]
   • 1594, Richard Hooker, Of the Lawes of Ecclesiastical Politie:

     In laws, that which is natural bindeth universally; that which is positive, not so.

3. Stated definitively and without qualification. [from the 16th c.]
   • 1622, Francis, Lord Verulam, Viscount St. Alban [i.e. Francis Bacon], The Historie of the Raigne of King Henry the Seventh, […], London: […] W[illiam] Stansby for Matthew Lownes, and William Barret, →OCLC:

     Positive words, that he would not bear arms against King Edward’s son.

4. Fully assured in opinion. [from the 17th c.]

   Synonyms: certain, sure, wis

   Antonyms: uncertain, unsure

   I’m absolutely positive you've spelt that wrong.

5. (mathematics, of a number) Greater than zero. [from the 18th c.]

   Antonyms: negative, nonpositive

   Hypernyms: nonzero, nonnegative

6. (mathematics, of a number, sometimes) Greater than or equal to zero.

   Synonym: nonnegative

   Antonyms: negative, nonpositive

   • 1987, Roger H. Hermanson, Robert H. Strawser, Auditing Theory and Practice‎, 4th edition, Irwin, →ISBN, page 323:

     Notice that each time the calculator balance becomes positive (zero or greater), the dollar item that forces this balance to become positive is selected for examination. Since each of these dollar items is contained […]

   • 1996 December 10, United States Patent and Trademark Office, “5,583,871: Method for high-speed charging of secondary batteries and apparatus therefor. Stewart N. Simmonds, Port Coquitlam, Canada, and Isamu Miyamoto, Tokyo, Japan, assignors to Datalink Corporation, Tokyo, Japan”, in Official Gazette of the United States Patent and Trademark Office: Patents‎, volume 1193, numbers 1-2, page 1528:

     a step 10 which judges whether each of the m amounts of differences in amount of voltage changes ΔHv1 to ΔHvm are positive (zero or greater than zero) or negative (less than zero): and […]

7. Characterized by constructiveness or influence for the better.
   • 1701, [Jonathan Swift], “Chapter I”, in A Discourse of the Contests and Dissensions between the Nobles and the Commons in Athens and Rome, with the Consequences They Had upon Both Those States, London: […] John Nutt […], →OCLC, page 11:

     Not to conſent to the Enacting of ſuch a Law, which has no view beſide to general Good, unleſs another Law ſhall at the ſame time paſs, with no other view but that of advancing the Power of one Party alone; What is this but to claim a positive Voice as well as a negative?

8. Overconfident, dogmatic.
   • 1711 May, [Alexander Pope], An Essay on Criticism, London: […] W[illiam] Lewis […]; and sold by W[illiam] Taylor […], T[homas] Osborn[e] […], and J[ohn] Graves […], →OCLC:

     Some positive, persisting fops we know, That, if once wrong, will needs be always so.

9. (chiefly philosophy) Actual, real, concrete, not theoretical or speculative.
   • 1597, Francis [Bacon], “Of the Colours of Good and Evill, a Fragment”, in The Essayes […], 3rd edition, London: […] Iohn Haviland […], published 1632, →OCLC:

     [I]f the privation be good, it followes not the former condition was evill, but lesse good; for the flower or blossome, is a positive good, although the remove of it to give place to the fruit, be a comparative good.

   • 1885, Marcellin Berthelot, Les Origines de l'Alkimie as quoted in M. M. Pattison Muir, A History of Chemical Theories and Laws, 1907.

     Chemistry is not a primitive science, like geometry or astronomy; it is constructed from the debris of a previous scientific formation; a formation half chimerical and half positive...

10. (physics) Having more protons than electrons.

    Antonym: negative

    A cation is a positive ion as it has more protons than electrons.

11. (grammar) Describing the primary sense of an adjective, adverb or noun; not comparative, superlative, augmentative nor diminutive.

    ‘Better’ is an irregular comparative of the positive form ‘good’.

12. (grammar) Describing a verb that is not negated, especially in languages which have distinct positive and negative verb forms, e.g., Finnish.
13. Derived from an object by itself; not dependent on changing circumstances or relations.

    Synonym: absolute

    The idea of beauty is not positive, but depends on the different tastes of individuals.

    positive knowledge

14. Characterized by the existence or presence of distinguishing qualities or features, rather than by their absence.

    The box was not empty – I felt some positive substance within it.

    • 1867, Henry Maudsley, The Physiology and Pathology of the Mind‎, New York: D. Appleton & Company, page 318:

      In other cases of moral alienation there will be found to have been more or less congenital moral defect, with maniacal exacerbations of positive moral insanity occurring perhaps at puberty, perhaps at the menstrual periods, perhaps after severe disappointment.

15. Characterized by the presence of features which support a hypothesis.

    The results of our experiment are positive.

16. Confirmed, straight-up.
    • 1986 April 19, Shelley Mains, “TV Shows Dykes as Yuppie "Gay Women"”, in Gay Community News, page 6:

      Ben […] , who seems at first to be a likable guy but is actually a positive sexist.

17. (photography) Of a visual image, true to the original in light, shade and colour values.

    A positive photograph can be developed from a photographic negative.

18. Favorable, desirable by those interested or invested in that which is being judged.

    Synonyms: good; see also Thesaurus:good

    Antonyms: bad, negative; see also Thesaurus:bad

    The first-night reviews were largely positive.

19. Wholly what is expressed; colloquially downright, entire, outright.

    Good lord, you've built up a positive arsenal of weaponry here.

20. Optimistic. [from the 20th c.]

    He has a positive outlook on life.

21. (chemistry) electropositive
22. (chemistry) basic; metallic; not acid; opposed to negative, and said of metals, bases, and basic radicals.
23. (slang) HIV positive.
    • quoted in 2013, William I. Johnston, HIV-Negative: How the Uninfected Are Affected by AIDS (page 145)

      We certainly told him at that time that I was negative. We talked about transmission. We told him we don't do anything that would cause me to become positive.

24. (New Age jargon) Good, desirable, healthful, pleasant, enjoyable.

    positive energy; positive thoughts, feelings or emotions

    • 2009, Christopher Johns, Becoming a Reflective Practitioner, John Wiley & Sons, page 15:

      Negative feelings can be worked through and their energy converted into positive energy... In crisis, normal patterns of self-organization fail, resulting in anxiety (negative energy). Being open systems, people can exchange this energy with the environment and create positive energy for taking action...

派生語

名詞

positive (plural positives)

1. A thing capable of being affirmed; something real or actual.
   • 1692–1717, Robert South, Twelve Sermons Preached upon Several Occasions, volume (please specify |volume=I to VI), London:

     rating Positives by their Privatives

2. A favourable point or characteristic.
3. Something having a positive value in physics, such as an electric charge.
4. (grammar) A degree of comparison of adjectives and adverbs.
5. (grammar) An adjective or adverb in the positive degree.
6. (photography) A positive image; one that displays true colors and shades, not their opposites or complements.

   Antonym: negative

   Coordinate term: diapositive

7. The positive plate of a voltaic or electrolytic cell.
8. A positive result of a test.

形容詞

positīve

1. vocative masculine singular of positīvus