1. (of a disease) spread by direct or indirect contact between people or organisms.
（指疾病）通過人與人或生物體之間直接或間接接觸而傳播的。
Chickenpox is a highly contagious illness.
水痘是一種傳染性極強的疾病。
The doctor confirmed it was not a contagious infection.
醫生確認這不是一種傳染性感染。
Contagious Meaning（定義、用法、例句與發音）
contagious
adjective
快速理解
What does "Contagious" mean?What are 2-3 core uses of "Contagious"?
形容事物能透過接觸或模仿而傳播開來。
- 1
疾病傳染
EN: A contagious disease spreads from person to person through direct or indirect contact.
翻譯: 指疾病可透過直接或間接接觸在人與人之間傳播。
- 2
情緒感染
EN: A contagious feeling or mood spreads quickly among people.
翻譯: 指情緒或氣氛能迅速在人與人之間蔓延。
- 3
行為模仿
EN: A contagious behavior or idea is easily adopted by others.
翻譯: 指行為或想法容易被他人模仿、採納。
小提醒：注意：在醫學上，'contagious' 通常指透過接觸傳播的疾病（如感冒），而 'infectious' 則涵蓋所有透過病原體傳播的疾病（包括透過空氣、水等），兩者不完全相同。
發音（How to Pronounce "Contagious" in English）
How to pronounce "Contagious" in English?"Contagious" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Contagious" from YouTube Videos
What you don't know about marriage | Jenna McCarthy
TED
“But here's a scary one. divorce is contagious. That's right.”
(1 out of 6)
Definitions（定義）
What are the definitions of "Contagious"?How does "Contagious" change by context?
2. (of an emotion, attitude, or behavior) likely to spread rapidly and affect others.
（指情緒、態度或行為）可能迅速傳播並影響他人的。
Her laughter was so contagious that soon everyone was smiling.
她的笑聲極具感染力，很快每個人都笑了起來。
A sense of panic can be contagious in a crowd.
恐慌感在人群中是會傳染的。
3. capable of transmitting a disease-causing agent.
能夠傳播致病源的。
The patient remained contagious for several days after the symptoms appeared.
病人在症狀出現後數天內仍具有傳染力。
He was isolated because he was still contagious.
他被隔離了，因為他仍然具有傳染性。
Grammar & Patterns（句型）
What are common sentence patterns for "Contagious"?How to make natural sentences with "Contagious"?
| Pattern | Meaning | Example |
|---|---|---|
| be + contagious | 具有傳染性的 | The virus is highly contagious. (這種病毒傳染性很強。) |
| contagious + disease/illness | 傳染病 | Measles is a contagious disease. (麻疹是一種傳染病。) |
| contagious + enthusiasm/laughter | 有感染力的熱情/笑聲 | Her laughter was contagious and soon we were all laughing. (她的笑聲很有感染力，很快我們都笑了起來。) |
| highly/extremely contagious | 高度/極具傳染性的 | The new strain is extremely contagious. (新的病毒株極具傳染性。) |
| remain contagious | 仍然具有傳染性 | Patients may remain contagious for several weeks. (病人可能在數週內仍具有傳染性。) |
用法說明
How is "Contagious" different from similar structures?What usage mistakes are common with "Contagious"?
contagious doing vs contagious to do
- contagious doing 通常描述一種持續的、普遍的或固有的傳染性狀態或特質。
- contagious to do 則常用於描述在特定情境或對特定對象表現出的傳染性，有時帶有「令人忍不住想...」的意味。
- 在描述疾病或情緒時，兩者有時可互換，但 contagious doing 更側重本質，contagious to do 更側重效果或反應。 EN: His enthusiasm was contagious, spreading quickly through the team. 翻譯: 他的熱情具有感染力，在團隊中迅速蔓延開來。
EN:Her laugh is so contagious that it's hard not to smile when you hear it.
翻譯:她的笑聲太有感染力了，讓人一聽到就忍不住想笑。
總結建議
一般情況下，描述本質特性用 contagious doing，強調引發的特定反應則可考慮 contagious to do。
易混淆對比
What is the difference between "Contagious" and similar words?How to choose "Contagious" vs alternatives?
contagious vs infectious
「contagious」強調透過直接或間接接觸傳播；「infectious」則泛指由病原體引起、可傳播的狀態，不一定需要接觸。
contagious vs communicable
「contagious」是「communicable」的一種，特指容易透過接觸快速傳播；「communicable」是更廣泛的醫學術語。
contagious vs catching
「catching」是「contagious」的非正式口語說法；「contagious」較正式且可用於比喻。
口語用法
How is "Contagious" used in spoken English?What is the spoken vs formal difference for "Contagious"?
引述
在口語中，常用來引述或轉述他人對某事物具有傳染性或感染力的說法，帶有非正式、生動的語氣。 EN: She said the enthusiasm in the room was just contagious. 翻譯: 她說房間裡的熱情簡直會傳染。
EN:Everyone kept telling me his laugh is contagious, and now I see why.
翻譯:大家一直跟我說他的笑聲很有感染力，現在我明白為什麼了。
語氣強調
用來強調某種情緒、行為或趨勢擴散得極快、難以抵擋，常與「just」、「so」、「really」等副詞連用加強語氣。 EN: The panic was just contagious; one person screamed and suddenly everyone was running. 翻譯: 恐慌蔓延得超快；一個人尖叫，突然間所有人都在跑。
EN:His positive attitude is so contagious, it really lifts the whole team's mood.
翻譯:他的積極態度太有感染力了，真的提振了整個團隊的士氣。
停頓填充
在思考如何描述某種迅速傳播的現象時，用作短暫的停頓填充詞，後面常接更具體的說明或例子。 EN: The mood in the market is... contagious, you know? Everyone's suddenly optimistic. 翻譯: 市場的氣氛是…會傳染的，懂嗎？大家突然都樂觀起來了。
EN:It's kind of a... contagious idea, I guess. Once one person starts doing it, others follow without thinking.
翻譯:這有點像是…會傳染的想法，我猜。一旦有人開始做，其他人想都不想就跟著做。
正式寫作注意：在學術或正式商業報告中，應避免將「contagious」用於比喻非生理性傳播（如情緒、趨勢），除非在特定領域（如社會心理學）有明確定義。建議改用「highly infectious」、「rapidly spreading」、「pervasive」、「influential」或「compelling」等更精確的詞彙。
常見短語
What common collocations use "Contagious"?What fixed phrases with "Contagious" should I remember?
contagious disease
adjective + noun
傳染病
highly contagious
adverb + adjective
高度傳染的
contagious laughter
adjective + noun
有感染力的笑聲
contagious enthusiasm
adjective + noun
有感染力的熱情
less contagious
adverb + adjective
傳染性較低的
contagious smile
adjective + noun
有感染力的微笑
remain contagious
verb + adjective
仍具有傳染性
常見錯誤
What are common mistakes with "Contagious"?Which "Contagious" sentences look correct but are wrong?
×The flu is very contagious to spread.
✓The flu is very contagious.
The word 'contagious' already means 'able to spread from person to person'. Adding 'to spread' is redundant and unnatural.
×His laugh is infectious, but his cold is contagious.
✓His laugh is contagious.
While both 'contagious' and 'infectious' can describe things that spread, 'contagious' is more commonly and correctly used for emotions, laughter, or attitudes that spread quickly. Using 'infectious' for laughter is also correct, but using 'contagious' for a cold is the primary medical usage. The mistake is in thinking they cannot be used interchangeably for non-medical spread.
×He is a contagious person.
✓He is contagious. / He has a contagious disease.
We describe a disease, condition, or emotion as 'contagious', not the person themselves. We say a person 'is contagious' (meaning they have a contagious illness) or 'has a contagious laugh', but not that they 'are a contagious person' as a character trait.
×The news spread contagious on social media.
✓The news spread contagiously on social media. / The news was contagious on social media.
'Contagious' is an adjective and must describe a noun (e.g., a contagious rumor). To describe *how* something spreads, use the adverb 'contagiously'. Alternatively, you can use the structure 'was contagious'.
×This disease is more contagious than that one.
✓This disease is more contagious than that one.
This sentence is grammatically correct. The common mistake is in the pronunciation: confusing 'contagious' /kənˈteɪ.dʒəs/ with 'contiguous' /kənˈtɪɡ.ju.əs/. Learners should be careful to pronounce the 'ta' /teɪ/ sound clearly.
詞形變化
What are the word forms of "Contagious"?What are tense/participle forms of "Contagious"?