retention

noun
  1. 1

    The act of retaining or something retained

  2. 2

    The act or power of remembering things

  3. 3

    A memory; what is retained in the mind

  4. 4

    The involuntary withholding of urine and faeces

  5. 5

    The length of time an individual remains in treatment

  6. 6

    That which contains something, as a tablet; a means of preserving impressions.

  7. 7

    The act of withholding; restraint; reserve.

  8. 8

    A place of custody or confinement.

  9. 9

    The right to withhold a debt, or of retaining property until a debt due to the person claiming the right is duly paid; a lien.

Source: https://en.wiktionary.org/wiki/retention