Source : Webster's Revised Unabridged Dictionary (1913)

Cruiser \Cruis"er\, n. Specif.: (Nav.)
   A man-of-war less heavily armed and armored than a battle
   ship, having great speed, and generally of from two thousand
   to twelve thousand tons displacement.

Cruiser \Cruis"er\ (kr?"z?r), n.
   One who, or a vessel that, cruises; -- usually an armed
   vessel.

Source : WordNet®

cruiser
     n 1: a car in which policemen cruise the streets; equipped with
          radiotelephonic communications to headquarters [syn: {police
          cruiser}, {patrol car}, {police car}, {prowl car}, {squad
          car}]
     2: a large fast warship; smaller than a battleship and larger
        than a destroyer
     3: a large motorboat that has a cabin and plumbing and other
        conveniences necessary for living on board [syn: {cabin
        cruiser}, {pleasure boat}, {pleasure craft}]