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From Middle French nullité, from Medieval Latin nullitalis, from Latin nullus


nullity (plural nullities)

  1. The state of being null, or void, or invalid.
    nullity of marriage
  2. (law) A void act; a defective proceeding or one expressly declared by statute to be a nullity.
  3. (mathematics) The difference between the rank of a matrix and the number of columns it has; the dimension of the nullspace of a matrix.

Derived terms[edit]