The Collaborative International Dictionary of English v.0.48:

Morale \Mo`rale"\, n. [F. See Moral, a.]
   The moral condition, or the condition in other respects, so
   far as it is affected by, or dependent upon, moral
   considerations, such as zeal, spirit, hope, and confidence;
   mental state, as of a body of men, an army, and the like.
   [1913 Webster]

WordNet (r) 3.0 (2006):

morale
    n 1: a state of individual psychological well-being based upon a
         sense of confidence and usefulness and purpose
    2: the spirit of a group that makes the members want the group
       to succeed [syn: esprit de corps, morale, team spirit]