- The definition of compression is the action or state of being squished down or made smaller or more pressed together.
When a pile of material is squished together and made smaller and more dense, this is an example of compression.
Compression crushed this can.
compression definition by Webster's New World
- a compressing or being compressed
- Mech. the compressing of the air-fuel mixture in an internal-combustion engine just before ignition
Origin: Middle English ; from Old French ; from Classical Latin compressio
compression definition by American Heritage Dictionary
- a. The act or process of compressing.b. The state of being compressed.
- a. The process by which the working substance in a heat engine, such as the vapor mixture in the cylinder of an internal-combustion engine, is compressed.b. The engine cycle during which this process occurs.
- Computer Science The process by which data is compressed into a form that minimizes the space required to store or transmit it.
- com·presˈsion·al adjective
compression - Computer Definition
A means of reducing the amount of data to be transmitted or stored. Compression is possible since there always is some amount of data redundancy or there may be a predictable flow to the data. These characteristics of a set of data or a stream of data allow the use of a sort of mathematical algorithm to represent or describe the original data in fewer bits. A matching decompression process reverses the compression process and restores the data to its original form, or an approximation thereof. Compression serves to improve the efficiency of data transmission and storage, and is especially valuable if bandwidth and memory resources are limited. Data compression techniques can include the following:
The storing of data in a format requiring less space. In communications, data compression is helpful because it enables devices to store or transmit the same amount of data in fewer bits, thus making the transmission of the data faster. Compression falls into two main categories: lossless compression and lossy compression. With lossless compression, the original data can be restored to be an exact replica of the original, whereas with lossy compression, one accepts some quality losses in the compression/decompression steps. Lossy compression is used mainly for audio and video data, for which the loss in data quality is easily overlooked by the human user. Before data is encrypted, it can be compressed using the compression standard gzip and its compression library zlib. Encrypted data can be entirely noncompressed.
See Also: Bit and Bit Challenges.
compression - Cultural Definition
See data compression.
compression - Medical Definition
- See condensation.
- The state of being compressed.
compression - Science Definition
- A force that tends to shorten or squeeze something, decreasing its volume.
- The degree to which a substance has decreased in size (in volume, length, or some other dimension) after being or while being subject to stress. See also strain.
- The re-encoding of data (usually the binary data used by computers) into a form that uses fewer bits of information than the original data. Compression is often used to speed the transmission of data such as text or visual images, or to minimize the memory resources needed to store such data.