1. the action of protecting someone or something from attack
防禦，保衛
The castle's defense was strong enough to withstand the siege.
城堡的防禦足夠堅固，能夠抵禦圍攻。
He joined the army to contribute to the nation's defense.
他加入軍隊是為了貢獻於國家的防衛。
Defense Meaning（定義、用法、例句與發音）
defense
noun
快速理解
What does "Defense" mean?What are 2-3 core uses of "Defense"?
指保護自己、他人或某物免受攻擊、傷害或批評的行為或系統。
- 1
軍事/體育防護
EN: The army built a strong defense against the invasion.
翻譯: 軍隊建立了強大的防禦來抵禦入侵。
- 2
法律辯護
EN: The lawyer presented a compelling defense for her client.
翻譯: 律師為她的當事人提出了有力的辯護。
- 3
論點支持
EN: He wrote an essay in defense of free speech.
翻譯: 他寫了一篇文章為言論自由辯護。
- 4
生物自衛機制
EN: The cactus has spines as a natural defense.
翻譯: 仙人掌有刺作為一種自然的防禦。
小提醒：注意拼寫：英式英語常拼寫為 'defence'，美式英語則為 'defense'。在 zh-TW 語境中，兩者都可能會遇到，但詞典頁面以美式拼寫 'defense' 為準。
發音（How to Pronounce "Defense" in English）
How to pronounce "Defense" in English?"Defense" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Defense" from YouTube Videos
Metal that breathes | Doris Kim Sung
TED
“That's the first line of defense for the body. It has pores, it has sweat glands.”
(1 out of 27)
Definitions（定義）
What are the definitions of "Defense"?How does "Defense" change by context?
2. the arguments or evidence presented to oppose an accusation or support an idea
辯護，辯解
The lawyer presented a strong defense for his client.
律師為他的當事人提出了強有力的辯護。
She wrote an essay in defense of free speech.
她寫了一篇為言論自由辯護的文章。
3. the players or team whose job is to prevent the opposing team from scoring in sports
防守方，防守隊員
Their defense was weak, allowing the other team to score easily.
他們的防守很弱，讓對方球隊輕易得分。
He plays defense on the basketball team.
他在籃球隊中擔任防守球員。
4. a means or method of protecting oneself from harm or criticism
防衛手段，防禦措施
A good password is your first defense against hackers.
一個好的密碼是你抵禦駭客的第一道防線。
Humor can sometimes be used as a defense mechanism.
幽默有時可以被用作一種防衛機制。
Grammar & Patterns（句型）
What are common sentence patterns for "Defense"?How to make natural sentences with "Defense"?
| Pattern | Meaning | Example |
|---|---|---|
| defense + against + noun | 對…的防禦 | The country strengthened its defense against cyber attacks. (該國加強了對網路攻擊的防禦。) |
| in + (someone's/something's) + defense | 為…辯護 | He spoke in her defense during the meeting. (他在會議上為她辯護。) |
| come to + (someone's) + defense | 為某人辯護 | His friends quickly came to his defense. (他的朋友們迅速為他辯護。) |
| a defense of + noun | 對…的辯護 | She wrote a passionate defense of free speech. (她寫了一篇為言論自由熱情辯護的文章。) |
| on defense | 處於防守狀態 | The team was on defense for most of the game. (這支球隊在比賽大部分時間都處於防守狀態。) |
| the best defense is a good offense | 最好的防禦就是進攻（諺語） | In business, sometimes the best defense is a good offense. (在商場上，有時最好的防禦就是主動出擊。) |
用法說明
How is "Defense" different from similar structures?What usage mistakes are common with "Defense"?
defense of vs. defense against
- defense of 用於表示「為...辯護」或「保護...的行為」，對象通常是某人、某個想法、某個地方或某個群體。
- defense against 用於表示「抵禦...的防衛」，對象通常是某種攻擊、威脅、指控或批評。
- 當談論法律辯護時，defense of 指為當事人辯護的行為，而 defense against 則指針對某項指控的辯護。
- 在體育中，defense against 一個強力對手是常見說法，而 defense of 一個冠軍頭銜則指衛冕。 EN: The lawyer's defense of the accused was passionate and thorough. 翻譯: 律師為被告所做的辯護充滿熱情且鉅細靡遺。
EN:The country strengthened its defense against cyber attacks.
翻譯:該國加強了對網路攻擊的防禦。
EN:He spoke in defense of freedom of speech.
翻譯:他發言捍衛言論自由。
EN:The castle's defense against the siege was impressive.
翻譯:這座城堡對圍攻的防禦令人印象深刻。
總結建議
一般來說，defense of 用於保護或支持的對象，而 defense against 用於抵禦或反擊的威脅。
易混淆對比
What is the difference between "Defense" and similar words?How to choose "Defense" vs alternatives?
defense vs protection
「defense」通常指積極抵禦攻擊或危險的行為或系統，常用於法律、軍事或體育領域；「protection」則更廣泛地指提供安全、庇護或防止傷害的狀態或措施。
defense vs guard
「defense」常指整體的防禦策略或狀態；「guard」則更側重於警戒、看守或防衛的具體動作或人員。
defense vs security
「defense」著重於抵禦威脅的動作或手段；「security」則強調安全的狀態、系統或感覺，範圍更廣。
口語用法
How is "Defense" used in spoken English?What is the spoken vs formal difference for "Defense"?
引述
在對話中，當重複或引述他人關於防禦、辯護的觀點時，常會使用這個詞。 EN: So you're saying our best defense is to stay quiet? 翻譯: 所以你是說我們最好的防禦就是保持沉默？
EN:Her main defense was that she wasn't even there at the time.
翻譯:她主要的辯護理由是當時她根本不在現場。
語氣強調
在口語中，有時會用 defense 來強調對某人或某事的支持與維護。
EN: Okay, I have to come to her defense here—she worked really hard on this project.
翻譯: 好吧，我必須在這裡為她辯護一下——她為這個專案真的非常努力。
EN:In his defense, he did warn us about the risks beforehand.
翻譯:為他說句公道話，他事先確實警告過我們有風險。
停頓填充
在組織思路或尋找合適詞語時，defense 可能出現在一些慣用短語中，作為短暫的停頓或轉折。
EN: Well, the defense... I mean, their argument just doesn't hold up.
翻譯: 嗯，那個辯護…我是說，他們的論點根本站不住腳。
EN:It's a good defense mechanism, you know, a way to cope with stress.
翻譯:這是一種很好的防禦機制，你知道的，一種應對壓力的方式。
注意：以上口語用法在正式寫作（如學術論文、法律文件、商業報告）中應避免。正式文體中應使用更精確、完整的句子結構來表達相關概念。
常見短語
What common collocations use "Defense"?What fixed phrases with "Defense" should I remember?
defense against
defense against [something]
對抗…的防禦
in defense of
in defense of [someone/something]
為…辯護；保衛…
self-defense
self-defense
自衛
national defense
national defense
國防
line of defense
first/second/primary line of defense
防線
mount a defense
mount a (strong/legal) defense
組織防禦；提出辯護
on the defense
be/put someone on the defense
處於防禦狀態；採取守勢
defense mechanism
defense mechanism
防禦機制
常見錯誤
What are common mistakes with "Defense"?Which "Defense" sentences look correct but are wrong?
×defence
✓defense
在美式英語中，名詞的正確拼法是 'defense'。'Defence' 是英式英語的拼法。學習者應根據使用的英語變體選擇正確的拼寫。
×He is expert in defense.
✓He is an expert in defense.
當 'expert' 作為可數名詞使用時，前面需要不定冠詞 'an'。這裡指的是「一位專家」。
×He works on defense industry.
✓He works in the defense industry.
表示在某個行業或領域工作時，應使用介系詞 'in'，並且行業名稱前通常需要定冠詞 'the'。
×The lawyer presented many strong defenses for his client.
✓The lawyer presented a strong defense for his client.
在法律上下文中，'defense' 指被告方的整體辯護論點或策略，通常視為不可數名詞。這裡用單數形式更自然。
×The team switched to a defense strategy.
✓The team switched to a defensive strategy.
'Defense' 是名詞，'defensive' 是形容詞。修飾名詞 'strategy' 時，應使用形容詞 'defensive'。
×The teams defense was weak.
✓The team's defense was weak.
表示所屬關係時，需要在單數名詞 'team' 後加上所有格符號 's ('s)。
詞形變化
What are the word forms of "Defense"?What are tense/participle forms of "Defense"?