D defs.my
Entry 2 senses Webster, 1913

Compression

/kəm-prĕsh'-ən/ · Com·pres·sion · IPA /kəmˈpɹɛʃ.ən/
01 n. The act of compressing, or state of being compressed.
  1. 1.
    The act of compressing, or state of being compressed.
  2. 2.
    reduction of the space required for storage (of binary data) by an algorithm which converts the data to a smaller number of bits while preserving the information content. The act of compressing {3}.(Computers)