The Collaborative International Dictionary of English v.0.48:

Cadre \Ca"dre\, n. [F. cadre, It. quadro square, from L.
   quadrum, fr. quatuor four.] (Mil.)
   The framework or skeleton upon which a regiment is to be
   formed; the officers of a regiment forming the staff.
   [Written also cader.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

cadre
    n 1: a small unit serving as part of or as the nucleus of a
         larger political movement [syn: cell, cadre]
    2: a nucleus of military personnel capable of expansion

The Free On-line Dictionary of Computing (19 January 2023):

CADRE

    The US software engineering vendor which merged
   with Bachman Information Systems to form Cayenne Software
   in July 1996.

   (1998-02-08)