Source : Webster's Revised Unabridged Dictionary (1913)

Mara \Ma"ra\, n. [Skr. m[=a]ra.] (Hind. Myth.)
   The principal or ruling evil spirit. --E. Arnold.

Mara \Ma"ra\, n. [Icel. mara nightmare, an ogress. See
   {Nightmare}.] (Norse Myth.)
   A female demon who torments people in sleep by crouching on
   their chests or stomachs, or by causing terrifying visions.

Mara \Ma"ra\, n. (Zo["o]l.)
   The Patagonian cavy ({Dolichotis Patagonicus}).

Source : WordNet®

Mara
     n 1: god of death; opposite of Kama
     2: hare-like rodent of the pampas of Argentina [syn: {Dolichotis
        patagonum}]