to press something into a smaller space

Firmly compress the soil in the pot so that the plant is secure. 把盆里的土压实使植株固定。

compressed air 压缩空气

to make information, a piece of writing, etc. shorter

The course compresses two year's training into six intensive months. 这项课程把两年的培训内容压缩成6个月的强化训练。

I managed to compress ten pages of notes into four paragraphs. 我设法把10页的笔记压缩成了4个段落。

to make a computer file use less space when it is stored in the memory of a computer or on a disk, by using a special program

to compress data/files 压缩数据／文件

a thick, soft piece of cloth that is pressed to a part of a person's body to stop bleeding or to reduce pain or swelling

a cold/hot compress 冷／热敷布