defect

名词 defect:

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

动词 defect:

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

1. The new car had to be withdrawn from the market because of a mechanical defect.
   那种新汽车因有机械缺陷只好撤出市场。
2. They detected no defect in the product.
   他们没发现产品有任何问题。
3. This was his fatal defect; he was of feeble will.
   这是他致命的弱点，他意志薄弱。
4. If it were not for this defect, I shall hire him at once.
   如果不是因为这个缺点，我会马上雇用他。
5. A defect in the fuel lines prevented the missile from blasting off.
   燃料管路上的一个缺陷妨碍了导弹的发射。

de.fect

n.（名词）
The lack of something necessary or desirable for completion or perfection; deficiency:
瑕疵，毛病：缺少圆满或完善所必需的某物，缺点，缺陷：
例句：
a visual defect.
视觉缺陷

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败；缺点参见 blemish
v.intr.（不及物动词）
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：背叛某人的祖国并取得在别国居住资格：
例句：
a Soviet citizen who defected to Israel.
一个叛逃到以色列的苏联公民

To abandon a position or an association, often to join an opposing group:
背叛：抛弃职位或联盟，通常是为了加入敌对的组织：
例句：
defected from the party over the issue of free trade.
在自由贸易的问题上背叛了自己的政党

来源：
Middle English
中古英语
from Latin dôfectus [failure, want] [from past participle of] dôficere [to desert, be wanting]
源自 拉丁语 dôfectus [缺乏，不足] [] 源自dôficere的过去分词 [抛弃，缺乏]
dô- [de-]
dô- [表示.否定.]
facere [to do] * see dhô-
facere [做] *参见 dhô-

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