1horizontal
2across
3crosswise
4horizontal stroke (in Chinese characters)
5to place (sth) flat (on a surface)
6to cross (a river, etc)
7in a jumble
8chaotic
9(in fixed expressions) harsh and unreasonable
10violent
Examples
gōng chéng工程héng横kuà跨le了liǎng两gè个shì jì世纪cái才wán chéng完成，
工程横跨了两个世纪才完成，
The construction spanned two centuries before it was completed.
横街的那端有一个幼儿园。
There is a kindergarten at the other end of the street.
你横穿马路要小心。
You must be careful of the traffic when you cross the street.