D defs.my
Entry 1 sense Webster, 1913

Incompressible

/ĭnˌ-kəm-prĕs'-əb-əl/ · In·com·press·i·ble · IPA /ˌɪnkəmprˈɛsəbəl/
01 a. Not compressible; incapable of being reduced by force or pressure into a smaller compass or volume; resisting compression; as, many liquids…
  1. 1.
    Not compressible; incapable of being reduced by force or pressure into a smaller compass or volume; resisting compression; as, many liquids and solids appear to be almost incompressible.