sure, certain, definite, positive

名詞 positive:

1. a film showing a photographic image whose tones correspond to those of the original subject

形容詞 positive:

1. characterized by or displaying affirmation or acceptance or certainty etc.
2. having a positive electric charge
   同義詞：electropositive
3. involving advantage or good
   同義詞：plus
4. indicating existence or presence of a suspected condition or pathogen
   同義詞：confirming
5. formally laid down or imposed
   同義詞：prescribed
6. impossible to deny or disprove
   同義詞：incontrovertible, irrefutable
7. of or relating to positivism
   同義詞：positivist, positivistic
8. reckoned, situated or tending in the direction which naturally or arbitrarily is taken to indicate increase or progress or onward motion
9. greater than zero
10. marked by excessive confidence
    同義詞：cocksure, overconfident
11. persuaded of; very sure
    同義詞：convinced, confident

1. Her behaviour was a positive outrage.
   她的行為殘暴到了極點。
2. He was positive that he had seen it in the newspaper.
   他肯定他已在報紙上看見過。
3. This charge is a positive charge.
   這個電荷是正電荷。
4. There is positive proof that he did it.
   有確切的證據(jù)證明他做了此事。

pos.i.tive

adj.Abbr. pos.（形容詞）縮寫 pos.
Characterized by or displaying certainty, acceptance, or affirmation:
肯定的：以確定性、同意或證實為特征的或展現(xiàn)這些特性的：
例句：
a positive answer; positive criticism.
肯定的回答；肯定的評論

Measured or moving forward or in a direction of increase or progress.
進(jìn)步的：向著增長或發(fā)展的方向移動或合乎這種標(biāo)準(zhǔn)的
Explicitly or openly expressed or laid down:
明確的：明確或公開地表達(dá)或制定的：
例句：
a positive demand.
明確的要求

Admitting of no doubt; irrefutable:
無疑的：不容置疑的；無法辯駁的：
例句：
positive proof.
不容置疑的證據(jù)

Very sure; confident:
確定的，有信心的：十分有把握的；自信的：
例句：
I`m positive he`s right.See Synonyms at sure
我堅信他是正確的參見 sure

Overconfident; dogmatic.
獨斷的：過于自信的；頑固的
Formally or arbitrarily determined; prescribed.
指定的：正式或擅自決定的；規(guī)定的
Concerned with practical rather than theoretical matters.
實證的：與實際而不是理論事物有關(guān)的
Composed of or characterized by the presence of particular qualities or attributes; real.
鎮(zhèn)定的：由特殊品質(zhì)或特質(zhì)組成的或以其為特點的；真實的
Philosophy
【哲學(xué)】
Of or relating to positivism.
實證主義的：實證哲學(xué)的或與此有關(guān)的
Of or relating to laws imposed by human authority rather than by nature or reason alone:
由權(quán)威制定的法律的：由人類的權(quán)威而不是由自然或理性施行的法律的，或與之有關(guān)的：
例句：
.the glaring discrepancy between American positive law and natural rights.(David Brion Davis)
.存在于美國政策性法律與人權(quán)之間明顯的矛盾.(戴維·布列恩·戴維斯)

Of or relating to religion based on revelation rather than on nature or reason alone.
啟示的，默示的：基于啟示而不是單以自然或理性的宗教的，或與其有關(guān)的
Informal Utter; absolute:
【非正式用語】 全然的：完全的；絕對的：
例句：
a positive darling.
極親愛的人

Mathematics
【數(shù)學(xué)】
Relating to or designating a quantity greater than zero.
正的：與比零大的數(shù)量有關(guān)的或表示比零大的數(shù)量的
Relating to or designating the sign ( + ).
正號的：表示或關(guān)于正號(+)的
Relating to or designating a quantity, number, angle, or direction opposite to another designated as negative.
正向的：關(guān)于或表明與另一個表示為負(fù)的相反的數(shù)量、數(shù)字、角度或方向的
Physics Relating to or designating electric charge of a sign opposite to that of an electron.
【物理學(xué)】 正電的：與電子所帶電性相反的電荷的，表示正電的或陽性的
Medicine Indicating the presence of a particular disease, condition, or organism:
【醫(yī)學(xué)】 陽性的：表明某種疾病、病癥或有機(jī)體的存在的：
例句：
a positive test for pregnancy.
驗孕呈陽性反應(yīng)

Biology Indicating or characterized by response or motion toward the source of a stimulus, such as light:
【生物學(xué)】 對刺激的反應(yīng)度的：表明對刺激源的回應(yīng)或運(yùn)動的、或以其為特點的，例如對于光：
例句：
positive tropism.
向刺激方向運(yùn)動的屬性

Having the areas of light and dark in their original and normal relationship, as in a photographic print made from a negative.
正片的：使明暗區(qū)處于它們原本及正常的關(guān)系中的，如位于從底片印出的相片上
Grammar Of, relating to, or being the simple uncompared degree of an adjective or adverb, as opposed to either the comparative or superlative.
【語法】 原級的：形容詞或副詞與比較級及最高級的相對簡單的原形的，或與這一原形有關(guān)的
Driven by or generating power directly through intermediate machine parts having little or no play:
直接的：直接由有很少或完全沒有轉(zhuǎn)動空間的中級機(jī)器設(shè)備啟動或產(chǎn)生動力的：
例句：
positive drive.
直接的驅(qū)動力量

n.（名詞）
An affirmative element or characteristic.
明確的要素：被證實的因素或特點
Philosophy Something perceptible to the senses.
【哲學(xué)】 可實證物：感覺器官能察覺到的事物
Mathematics A quantity greater than zero.
【數(shù)學(xué)】 正值：比零大的數(shù)量
Physics A positive electric charge.
【物理學(xué)】 正電：正電荷，陽電荷
A photographic image in which the lights and darks appear as they do in nature.
正片：明暗在其上的顯示與在自然中一樣的影像
Grammar
【語法】
The uncompared degree of an adjective or adverb.
原級：形容詞或副詞的非比較級
A word in this degree.
原級詞：原級形容詞或副詞
Music A division of some pipe organs, similar in sound to the great but smaller and less powerful.
【音樂】 琴管：管風(fēng)琴的一種，與大管風(fēng)琴的音質(zhì)相似，但比其小而且音量較其弱

來源：
Middle English [having a specified quality]
中古英語 [具有某種品質(zhì)的]
from Old French positif
源自 古法語 positif
from Latin positovus [formally laid down]
源自 拉丁語 positovus [正式制定的]
from positus [past participle of] pônere [to place] * see apo-
源自 positus [] pônere的過去分詞 [放置] *參見 apo-

【引伸】
pos.itively
adv.（副詞）
pos.itiveness 或
pos.itiv.ity
n.（名詞）