Source : Webster's Revised Unabridged Dictionary (1913)

Reassure \Re`as*sure"\, v. t.
   1. To assure anew; to restore confidence to; to free from
      fear or terror.

            They rose with fear, . . . Till dauntless Pallas
            reassured the rest.                   --Dryden.

   2. To reinsure.

Source : WordNet®

reassure
     v 1: cause to feel sure; give reassurance to; "The airline tried
          to reassure the customers that the planes were safe"
          [syn: {assure}] [ant: {worry}]
     2: give or restore confidence in; cause to feel sure or
        certain; "I reassured him that we were safe"