Source : Webster's Revised Unabridged Dictionary (1913)

Commensurate \Com*men"su*rate\, v. t. [imp. & p. p.
   {Commensurated}; p. pr. & vb. n. {Commensurating}.] [Pref.
   com- + mensurate.]
   1. To reduce to a common measure. --Sir T. Browne.

   2. To proportionate; to adjust. --T. Puller

Commensurate \Com*men"su*rate\, a.
   1. Having a common measure; commensurable; reducible to a
      common measure; as, commensurate quantities.

   2. Equal in measure or extent; proportionate.

            Those who are persuaded that they shall continue
            forever, can not choose but aspire after a happiness
            commensurate to their duration.       --Tillotson.

Source : WordNet®

commensurate
     adj : corresponding in size or degree or extent; "pay should be
           commensurate with the time worked" [ant: {incommensurate}]