Korean Dictionary
How to say "Fiber Optic" in Korean
“Fiber Optic” in Korean is 광섬유 (pronounced "gwangseomu").
광섬유
gwangseomu
Usage & Context
A technology for transmitting data using light through glass fibers. Fiber optic networks provide fast internet in Korea.
Example Sentence
광섬유 인터넷을 사용해요.
I use fiber optic internet.
How to use 광섬유 naturally
Quick answer
The Korean word for “Fiber Optic” is 광섬유, romanized as gwangseomu.
Usage tip
Learn this word together with a complete Korean sentence. Meaning often depends on particles, politeness level, and word order.
Common mistake
Do not rely only on the English meaning. Read the Korean example sentence and notice the particles, word order, and politeness level around 광섬유.
Pronunciation Guide
Pronounce "gwang" like 'gwahng' (rhymes with 'song' but with a 'gw' sound). "Seo" sounds like 'suh' in 'sum' or 'saw' in British English. "Mu" sounds like 'moo'.
More Example Sentences
Boasting about internet speed at home.
우리 집은 광섬유 인터넷이라 속도가 아주 빨라요.
Our house has fiber optic internet, so the speed is very fast.
Explaining a technical benefit of fiber optics.
광섬유 케이블은 데이터 전송에 효율적이에요.
Fiber optic cables are efficient for data transmission.
Explaining how global connectivity works.
해저 광섬유 케이블 덕분에 국제 통신이 가능해요.
International communication is possible thanks to undersea fiber optic cables.
Cultural Context
Korea boasts one of the highest internet penetration rates and fastest average internet speeds globally, largely due to extensive deployment of fiber optic infrastructure. This advanced network supports everything from competitive online gaming (e-sports is huge in Korea) to high-definition streaming and remote work, making fast, reliable internet an expectation rather than a luxury for most Koreans.
Editorial note
We review entries like 광섬유 for pronunciation, example sentence fit, and learner mistakes so the page answers more than a direct dictionary lookup.
Reviewed by Min-jung Park, Korean Language Teacher. Updated May 31, 2026. See our editorial standards.
Common Phrases
광섬유 케이블
fiber optic cable
광섬유 통신
fiber optic communication
광섬유 인터넷
fiber optic internet
Related Expressions
인터넷
inteonet
internet
케이블
keibeul
cable
초고속 인터넷
chogosok inteonet
ultra-high speed internet
데이터 전송
deiteo jeonsong
data transmission
More Technology Words
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