| 单词 | positive |
| 释义 | positive adj. & n. --adj 1. formally or explicitly stated; definite, unquestionable (positive proof). 2. (of a person) convinced, confident, or overconfident in his or her opinion (positive that I was not there). 3. a absolute; not relative. b Gram. (of an adjective or adverb) expressing a simple quality without comparison (cf. COMPARATIVE, SUPERLATIVE). 4. colloq. downright; complete (it would be a positive miracle). 5. constructive; directional (positive criticism; positive thinking). 6. marked by the presence rather than absence of qualities or Med. symptoms (a positive reaction to the plan; the test was positive). 7. esp. Philos. dealing only with matters of fact; practical (cf. POSITIVISM 1). 8. tending in a direction naturally or arbitrarily taken as that of increase or progress (clockwise rotation is positive). 9. greater than zero (positive and negative integers) (opp. NEGATIVE). 10. Electr. of, containing, or producing the kind of electrical charge produced by rubbing glass with silk; an absence of electrons. 11. (of a photographic image) showing lights and shades or colours true to the original (opp. NEGATIVE). --n a positive adjective, photograph, quantity, etc. Phrases and idioms positive discrimination the practice of making distinctions in favour of groups considered to be underprivileged. positive feedback 1. a constructive response to an experiment, questionnaire, etc. 2. Electronics the return of part of an output signal to the input, tending to increase the amplification etc. positive geotropism see GEOTROPISM. positive pole the north-seeking pole. positive ray Physics a canal ray. positive sign = plus sign. positive vetting Brit. an exhaustive inquiry into the background and character of a candidate for a post in the Civil Service that involves access to secret material. Derivatives positively adv. positiveness n. positivity n. Etymology: ME f. OF positif -ive or L positivus (as POSIT) |
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