a.

1. 確定的；確實的
   There is positive proof that he did it.

   有確鑿的證據證明他做了這件事。

2. 確信的；有自信的[F][（+of/about）][+（that）]
   Are you positive that you saw him?

   你肯定你看到他嗎？

3. 絕對的
4. 積極的，建設性的
   He has a positive attitude towards life.

   他對生活持有積極的態度。

5. 真實的；實際的；實在的[Z][B]
   Light is a positive thing; darkness is only the absence of light.

   光是確實存在的東西；黑暗只是沒有光。

6. 【口】完全的，純粹的[Z][B]
   He is a positive fool.

   他是一個十足的傻瓜。

7. 【文】原級的[Z]
   "Good" is the positive form of the adjective, "better" is the comparative.

   "好"是該形容詞的原級，"更好'是比較級。

8. 【數】正的[Z]
   Five is a positive number.

   五是正數。

9. 【物】正的，陽性的[Z]
10. 【攝】正片的，正像的[Z]
11. 【醫】陽性的
    The blood tests were positive.

    驗血結果呈陽性。

n.[C]

1. 實在的事物
2. 正面
3. 【文】原級[the S]
4. 【數】正數
5. 【攝】正片，正像
6. （電池的）陽極

adj.

1. consisting in or characterized by the presence rather than the absence of something.
   ▸expressing or implying affirmation, agreement, or permission.
   ▸ [often in combination] having a specified substance or condition:

   HIV-positive.
2. constructive, optimistic, or confident.
3. with no possibility of doubt; certain.
4. (of a quantity) greater than zero.
5. containing, producing, or denoting the kind of electric charge opposite to that carried by electrons.
6. (of a photographic image) showing light and shade or colours true to the original.
7. Grammar  (of an adjective or adverb) expressing a quality in its basic, primary degree. Contrasted with comparative and superlative.
8. chiefly Philosophy  dealing only with matters of fact and experience. See also positivism (sense ¹).

n.

1. a desirable quality or attribute.
2. a positive photographic image, especially one printed from a negative.

[名]

1. ①積極。
2. ②陽性。