What Does 친구 (Chingu) Mean in Korean?
Written and reviewed by Jun and Jin, native Korean speakers
Published · Updated · How we write & review
After this page, you can tell when 친구 (chingu) fits and when an age gap calls for 형, 누나, 오빠, 언니 or 동생 instead.
10-second answer
What Does 친구 (Chingu) Mean in Korean?
친구 (chingu) means "friend" — but in strict traditional usage, it specifically means someone the SAME AGE as you (often the same birth year). A close relationship with someone even one year older or younger technically uses a different word (형/누나/오빠/언니, hyung/noona/oppa/unnie, or 동생, dongsaeng), even though modern casual usage has loosened this considerably.
Quick check — did that land?
1. In strict traditional usage, who counts as your 친구?
친구는 친한 사람을 뜻하지만, 전통적으로 같은 나이 또래를 가리켜요. 다이브인 코리안에서 더 배워보세요.
Quick Examples
얘는 제 친구예요.
yaeneun je chinguyeyo.
This is my friend.
Introducing someone the same age as you.
우리 친구 하자.
uri chingu haja.
Let's be friends.
Often said when discovering you're the same age/birth year as someone you just met.
See also: 동생 (dongsaeng) — younger sibling/friend
Why Age Matters Here Too
This connects directly to everything covered on the age system and kinship pages: because Korean social structure is organized by age, "friend" isn't just about closeness — it specifically marks a PEER relationship. A person one year older than you, even if you're extremely close, is technically 형/누나/오빠/언니 territory, not 친구 territory, in strict traditional usage.
This is why Koreans meeting someone new often ask their birth year almost immediately (몇 년생이세요?) — it decides whether the relationship becomes 친구 (peer) or a hierarchy-based one (오빠/누나/etc.).
Friends a year or two older usually get a sibling word instead of 친구: 언니 (eonni), 누나 (nuna), 오빠 (oppa) or 형 (hyeong) — and 언니 vs 누나 explains who says which.
How Modern Usage Has Loosened
In casual, everyday speech — especially among younger Koreans — 친구 gets used more loosely for any close friend regardless of a small age gap, similar to how English uses "friend" freely. But the strict, same-age meaning remains the default assumption, and understanding it explains a lot of Korean social behavior that otherwise seems oddly age-obsessed to outsiders.
동갑, 이 친구, 남사친: 친구 Beyond "Friend"
The dictionary definition of 친구, "a person you've been close to for a long time," never mentions age. But in modern Korean the word has settled into meaning someone your own age, and it's hard to call anyone else 친구. The word for being the same age is 동갑 (donggap), and a same-age person is a 동갑내기 (donggamnaegi).
돼지띠면 나랑 동갑이네.
dwaejittimyeon narang donggabine.
If you're a Pig, you're the same age as me.
Zodiac years are another way to compare ages — this one is the dictionary's own example.
그 친구 일 잘해요.
geu chingu il jalhaeyo.
That guy is good at his job.
A manager about a younger employee — here 친구 doesn't necessarily mean "friend" at all.
That second example is 친구's other dictionary meaning: a casual, slightly top-down way to refer to someone your age or younger — 이 친구 ("this guy"), 그 친구 ("that guy").
A close friend who is older isn't called 친구 to their face: a man says 형 or 누나, a woman says 오빠 or 언니, and the younger one is their 동생.
Introductions follow the same line. An older person can introduce a younger friend as 친구, but a younger person introducing an older friend as 친구 sounds odd. Instead, they use a title, and the everyday ones each have a more respectful form: 형 becomes 형님, 누나 becomes 누님, and a woman may call an older man 오라버니 instead of 오빠, out of respect or when the age gap is large. 언니 has no higher form, so a woman keeps saying 언니 for an older woman. For example: 오래 알고 지낸 친한 형님입니다 (orae algo jinaen chinhan hyeongnimimnida, "He's a close older friend I've known for years").
Finally, 남사친 (namsachin) and 여사친 (yeosachin) — short for 남자 사람 친구 and 여자 사람 친구, a platonic guy friend or girl friend — are still in everyday use. The words were coined to set a friend apart from 남자 친구 and 여자 친구, which mean boyfriend and girlfriend. They're listed in the National Institute of Korean Language's open dictionary, 우리말샘.
Common Phrases
가장 친한 친구예요.
gajang chinhan chinguyeyo.
[They're] my best friend.
친하다 (to be close) + 친구.
남자친구 / 여자친구
boyfriend / girlfriend
남자 (male) / 여자 (female) + 친구 — note this compound does NOT follow the same-age rule; it simply means romantic partner.
Common Mistakes
Mistake #1 — Calling anyone close to you 친구 regardless of age
Strictly, a close older person is 오빠/형/누나/언니 territory, not 친구 — though modern casual use blurs this somewhat.
Mistake #2 — Assuming 남자친구/여자친구 also follow the same-age rule
These specific compounds simply mean "boyfriend/girlfriend" — the age-peer rule doesn't apply to them the way it does to 친구 alone.
Mini Quiz
2 short questions — about 1 minute
2. Why do Koreans often ask your birth year soon after meeting?
3. Does 여자친구 (girlfriend) follow the same-age rule of 친구?
Related Knowledge
Learn Next
What Does 야 (Yah) Mean? The Casual Name-Calling Particle
Once you know who counts as your 친구, this is exactly how you'd casually call out to them.
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