Source : Webster's Revised Unabridged Dictionary (1913)

Lazaret \Laz`a*ret"\, Lazaretto \Laz`a*ret"to\, n. [F. lazaret,
   or It. lazzeretto, fr. Lazarus. See {Lazar}.]
   A public building, hospital, or pesthouse for the reception
   of diseased persons, particularly those affected with
   contagious diseases.

Lazaret \Laz`a*ret"\, Lazaretto \Laz`a*ret"to\n. (Naut.)

   Note: (Pronounced by seamen ?)
   A low space under the after part of the main deck, used as a
   storeroom.

Source : WordNet®

lazaretto
     n 1: hospital for persons with infectious diseases (especially
          leprosy) [syn: {lazaret}, {lazarette}, {lazar house}, {pesthouse}]
     2: a small locker at the stern of a boat or between decks of a
        ship [syn: {glory hole}]