Source : Webster's Revised Unabridged Dictionary (1913)

Esprit \Es`prit"\, n. [F. See {Spirit}.]
   Spirit.

   {Esprit de corps}, a French phrase much used by English
      writers to denote the common spirit pervading the members
      of a body or association of persons. It implies sympathy,
      enthusiasm, devotion, and jealous regard for the honor of
      the body as a whole.

Source : WordNet®

esprit de corps
     n : the spirit of a group that makes the members want the group
         to succeed [syn: {morale}, {team spirit}]