WordReference Random House Unabridged Dictionary of American English © 2015
re•gres•sion  (ri greshən), 
  1. the act of going back to a previous place or state;
    return or reversion.
  2. retrogradation;
  3. Developmental Biology[Biol.]reversion to an earlier or less advanced state or form or to a common or general type.
  4. Psychiatry[Psychoanal.]the reversion to a chronologically earlier or less adapted pattern of behavior and feeling.
  5. Medicinea subsidence of a disease or its manifestations:a regression of symptoms.

  • Statisticsof, pertaining to, or determined by regression analysis:regression curve; regression equation.
  • Etymology:
    • Latin regressiōn- (stem of regressiō). See regress, -ion
    • 1510–20

    WordReference Random House Learner's Dictionary of American English © 2015
    re•gress /v. rɪˈgrɛs; n. ˈrigrɛs/USA pronunciation v. [no object]
    1. to move backward;
      go back, esp. to an earlier, worse, or less advanced state or form:For a while the patient was making progress, but now he seems to be regressing.

    n. [uncountable]
  • the act of regressing.
  • re•gres•sion /rɪˈgrɛʃən/USA pronunciationn. [uncountable]
    re•gres•sive /rɪˈgrɛsɪv/USA pronunciationadj. See -gress-.

    Collins Concise English Dictionary © HarperCollins Publishers::

    regression /rɪˈɡrɛʃən/ n
    1. the adoption by an adult or adolescent of behaviour more appropriate to a child, esp as a defence mechanism to avoid anxiety
    2. the analysis or measure of the association between one variable (the dependent variable) and one or more other variables (the independent variables), usually formulated in an equation in which the independent variables have parametric coefficients, which may enable future values of the dependent variable to be predicted
    3. (as modifer): regression curve
    4. the retreat of the sea from the land
    5. the act of regressing

    'regression' also found in these entries:

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