Compression may refer to: Physical science Compression (physics), size reduction due to forces Compression member, a structural element such as a column Compressibility, susceptibility to compression Gas compression Compression ratio, of a combustion engine Compression (geology) Compression or compressive strength Information science Data compression, reducing the data required for information Audio compression (data), reducing the data required for audio Bandwidth compression Compression artifact, defect in data due to compression Image compression, of digital images Video compression One-way compression function, a cryptographic primitive Dynamic range compression, reducing audio dynamic range Medicine Brain compression, a medical condition Compression bandage Pressing on the lower abdominal area in an intravenous pyelogram Cold compression therapy, for minor injuries Other Amplifier gain compression, due to nonlinearity Compression (dance), several techniques Compression (functional analysis) Compression (phonetics), running syllables together See also Compaction (disambiguation) Compress Compression garment Compressor (disambiguation) Decompression (disambiguation) Expansion (disambiguation)