名詞 defect:

1. an imperfection in a bodily system
2. a failing or deficiency
   同義詞：shortcoming
3. an imperfection in a device or machine
   同義詞：fault, flaw
4. a mark or flaw that spoils the appearance of something (especially on a person's body)
   同義詞：blemish, mar

動(dòng)詞 defect:

1. desert (a cause, a country or an army), often in order to join the opposing cause, country, or army
   同義詞：desert

1. The new car had to be withdrawn from the market because of a mechanical defect.
   那種新汽車(chē)因有機(jī)械缺陷只好撤出市場(chǎng)。
2. They detected no defect in the product.
   他們沒(méi)發(fā)現(xiàn)產(chǎn)品有任何問(wèn)題。
3. This was his fatal defect; he was of feeble will.
   這是他致命的弱點(diǎn)，他意志薄弱。
4. If it were not for this defect, I shall hire him at once.
   如果不是因?yàn)檫@個(gè)缺點(diǎn)，我會(huì)馬上雇用他。
5. A defect in the fuel lines prevented the missile from blasting off.
   燃料管路上的一個(gè)缺陷妨礙了導(dǎo)彈的發(fā)射。

de.fect

n.（名詞）
The lack of something necessary or desirable for completion or perfection; deficiency:
瑕疵，毛?。喝鄙賵A滿或完善所必需的某物，缺點(diǎn)，缺陷：
例句：
a visual defect.
視覺(jué)缺陷

An imperfection that causes inadequacy or failure; a shortcoming.See Synonyms at blemish
欠缺：由不完善而引起的不足和失?。蝗秉c(diǎn)參見(jiàn) blemish
v.intr.（不及物動(dòng)詞）
de.fect.ed,de.fect.ing,de.fects[d-fμkt.]
To disown allegiance to one`s country and take up residence in another:
叛逃：背叛某人的祖國(guó)并取得在別國(guó)居住資格：
例句：
a Soviet citizen who defected to Israel.
一個(gè)叛逃到以色列的蘇聯(lián)公民

To abandon a position or an association, often to join an opposing group:
背叛：拋棄職位或聯(lián)盟，通常是為了加入敵對(duì)的組織：
例句：
defected from the party over the issue of free trade.
在自由貿(mào)易的問(wèn)題上背叛了自己的政黨

來(lái)源：
Middle English
中古英語(yǔ)
from Latin dôfectus [failure, want] [from past participle of] dôficere [to desert, be wanting]
源自 拉丁語(yǔ) dôfectus [缺乏，不足] [] 源自dôficere的過(guò)去分詞 [拋棄，缺乏]
dô- [de-]
dô- [表示.否定.]
facere [to do] * see dhô-
facere [做] *參見(jiàn) dhô-

【引伸】
defec.tion
n.（名詞）
defec.tor
n.（名詞）