Source : Webster's Revised Unabridged Dictionary (1913)

Mourner \Mourn"er\, n.
   1. One who mourns or is grieved at any misfortune, as the
      death of a friend.

            His mourners were two hosts, his friends and foes.
                                                  --Byron.

   2. One who attends a funeral as a hired mourner.

            Mourners were provided to attend the funeral.
                                                  --L'Estrange.

Source : WordNet®

mourner
     n : a person who is feeling grief (as grieving over someone who
         has died) [syn: {griever}, {sorrower}, {lamenter}]