中
1
medium (size);average (grade, level, etc.);middle
2
suffix
in;within;out of (e.g. ten people);among
空気中のごく小さい粒子がガンのもとになり得る。
Tiny particles in the air can cause cancer.
3
suffix
during;while;in (the course of);within (a period);throughout
彼は旅行中に病気になった。
He got sick during the trip.
4
suffix
currently (doing);in the process of;in the middle of;under (e.g. construction, investigation)
隣の部屋では会議中です。
There is a conference going on in the next room.
5
middle way;moderation
7
junior high school;middle school
See also:
中学校 (ちゅうがっこう)
8
China
See also:
中国 (ちゅうごく)