The Collaborative International Dictionary of English v.0.48:

Jihad \Ji*had"\, Jehad \Je*had"\, n. [Ar. jih[=a]d.] (Moham.)
   A religious war against infidels or Mohammedan heretics;
   also, any bitter war or crusade for a principle or belief.

         [Their] courage in war . . . had not, like that of the
         Mohammedan dervishes of the Sudan, or of Mohammedans
         anywhere engaged in a jehad, a religious motive and the
         promise of future bliss behind it.       --James Bryce.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

jehad \jehad\ n.
   Same as jihad.

   Syn: jihad.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

jehad
    n 1: a holy war waged by Muslims against infidels [syn: jihad,
         jehad, international jihad]
    2: a holy struggle or striving by a Muslim for a moral or
       spiritual or political goal [syn: jihad, jehad]