When to use police officer in Korean
Korean: 경찰[ gyeong-chal ]

When to use it
A police officer is a person whose job is to help keep people safe and enforce the law. In Korean, 경찰 can mean one police officer or police in general, depending on the sentence. You often use this word when talking about asking for help, catching criminals, or directing traffic.
Example sentences
우리 아빠는 경찰이에요.
My dad is a police officer.
학교 앞에 경찰이 있어요.
There is a police officer in front of the school.
경찰이 길을 알려 줬어요.
The police officer showed me the way.
저는 길에서 경찰에게 물어봤어요.
I asked a police officer on the street.
경찰이 도둑을 잡았어요.
The police officer caught the thief.
경찰이 교통을 정리해요.
The police officer directs traffic.