pos·i·tive /ˈpɑzətɪv, ˈpɑztɪv/
 (a.)確實的,明確的;積極的,肯定的;正的,陽性的;完全的十足的正片
 pos·i·tive /ˈpɑzətɪv, ˈpɑztɪv/ 形容詞
 正的,陽性的
 positive
 負-正; 負極-正極 NP
 positive
 正片(影)
 positive
 正
 Pos·i·tive a.
 1. Having a real position, existence, or energy; existing in fact; real; actual; -- opposed to negative. “Positive good.”
 2. Derived from an object by itself; not dependent on changing circumstances or relations; absolute; -- opposed to relative; as, the idea of beauty is not positive, but depends on the different tastes individuals.
 3. Definitely laid down; explicitly stated; clearly expressed; -- opposed to implied; as, a positive declaration or promise.
    Positive words, that he would not bear arms against King Edward's son.   --Bacon.
 4. Hence: Not admitting of any doubt, condition, qualification, or discretion; not dependent on circumstances or probabilities; not speculative; compelling assent or obedience; peremptory; indisputable; decisive; as, positive instructions; positive truth; positive proof. “'T is positive 'gainst all exceptions.”
 5. Prescribed by express enactment or institution; settled by arbitrary appointment; said of laws.
    In laws, that which is natural bindeth universally; that which is positive, not so.   --Hooker.
 6. Fully assured; confident; certain; sometimes, overconfident; dogmatic; overbearing; -- said of persons.
 Some positive, persisting fops we know,
 That, if once wrong, will needs be always.   --Pope.
 7. Having the power of direct action or influence; as, a positive voice in legislation.
 8. Photog. Corresponding with the original in respect to the position of lights and shades, instead of having the lights and shades reversed; as, a positive picture.
 9. Chem. (a) Electro-positive. (b) Hence, basic; metallic; not acid; -- opposed to negative, and said of metals, bases, and basic radicals.
 10. Mach. & Mech. (a) Designating, or pertaining to, a motion or device in which the movement derived from a driver, or the grip or hold of a restraining piece, is communicated through an unyielding intermediate piece or pieces; as, a claw clutch is a positive clutch, while a friction clutch is not. (b) Designating, or pertaining to, a device giving a to-and-fro motion; as, a positive dobby.
 11.  Vehicles Designating a method of steering or turning in which the steering wheels move so that they describe concentric arcs in making a turn, to insure freedom from side slip or harmful resistance.
 Positive crystals Opt., a doubly refracting crystal in which the index of refraction for the extraordinary ray is greater than for the ordinary ray, and the former is refracted nearer to the axis than the latter, as quartz and ice; -- opposed to negative crystal, or one in which this characteristic is reversed, as Iceland spar, tourmaline, etc.
 Positive degree Gram., that state of an adjective or adverb which denotes simple quality, without comparison or relation to increase or diminution; as, wise, noble.
 Positive electricity Elec, the kind of electricity which is developed when glass is rubbed with silk, or which appears at that pole of a voltaic battery attached to the plate that is not attacked by the exciting liquid; -- formerly called vitreous electricity; -- opposed to negative electricity.
 Positive eyepiece. See under Eyepiece.
 Positive law. See Municipal law, under Law.
 Positive motion Mach., motion which is derived from a driver through unyielding intermediate pieces, or by direct contact, and not through elastic connections, nor by means of friction, gravity, etc.; definite motion.
 Positive philosophy. See Positivism.
 Positive pole. (a) Elec. The pole of a battery or pile which yields positive or vitreous electricity; -- opposed to negative pole. (b) Magnetism The north pole. [R.]
 Positive quantity Alg., an affirmative quantity, or one affected by the sign plus [+].
 Positive rotation Mech., left-handed rotation.
 Positive sign Math., the sign [+] denoting plus, or more, or addition.
 Pos·i·tive, n.
 1. That which is capable of being affirmed; reality.
 2. That which settles by absolute appointment.
 3. Gram. The positive degree or form.
 4. Photog. A picture in which the lights and shades correspond in position with those of the original, instead of being reversed, as in a negative.
 5. Elec. The positive plate of a voltaic or electrolytic cell.
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 positive
      adj 1: characterized by or displaying affirmation or acceptance or
             certainty etc.; "a positive attitude"; "the reviews
             were all positive"; "a positive benefit"; "a positive
             demand" [ant: negative, neutral]
      2: having a positive electric charge; "protons are positive"
         [syn: electropositive] [ant: negative, neutral]
      3: involving advantage or good; "a plus (or positive) factor"
         [syn: plus]
      4: indicating existence or presence of a suspected condition or
         pathogen; "a positive pregnancy test" [syn: confirming]
         [ant: negative]
      5: formally laid down or imposed; "positive laws" [syn: prescribed]
      6: impossible to deny or disprove; "incontrovertible proof of
         the defendant's innocence"; "proof positive"; "an
         irrefutable argument" [syn: incontrovertible, irrefutable]
      7: of or relating to positivism; "positivist thinkers";
         "positivist doctrine"; "positive philosophy" [syn: positivist,
          positivistic]
      8: greater than zero; "positive numbers"
      9: marked by excessive confidence; "an arrogant and cocksure
         materialist"; "so overconfident and impudent as to speak
         to the queen"; "the less he knows the more positive he
         gets" [syn: cocksure, overconfident]
      10: persuaded of; very sure; "were convinced that it would be to
          their advantage to join"; "I am positive he is lying";
          "was confident he would win" [syn: convinced(p), positive(p),
           confident(p)]
      11: granting what has been desired or requested; "a favorable
          reply"; "a positive answer" [syn: favorable]
      n : a film showing a photographic image whose tones correspond
          to those of the original subject