Source : Webster's Revised Unabridged Dictionary (1913)

Extent \Ex*tent"\, a. [L. extentus, p. p. of extendere. See
   {Extend}.]
   Extended. [Obs.] --Spenser.

Extent \Ex*tent"\, n. [L. extentus, fr. extendere. See
   {Extend}.]
   1. Space or degree to which a thing is extended; hence,
      superficies; compass; bulk; size; length; as, an extent of
      country or of line; extent of information or of charity.

            Life in its large extent is scare a span. --Cotton.

   2. Degree; measure; proportion. ``The extent to which we can
      make ourselves what we wish to be.'' --Lubbock.

   3. (Eng. Law)
      (a) A peculiar species of execution upon debts due to the
          crown, under which the lands and goods of the debtor
          may be seized to secure payment.
      (b) A process of execution by which the lands and goods of
          a debtor are valued and delivered to the creditor.

Source : WordNet®

extent
     n 1: the point or degree to which something extends; "the extent
          of the damage"; "the full extent of the law"; "to a
          certain extent she was right"
     2: the distance or area or volume over which something extends;
        "the vast extent of the desert"; "an orchard of
        considerable extent"