The Collaborative International Dictionary of English v.0.48:

aerospace \aerospace\ n.
   1. the atmosphere and outer space considered together or as a
      whole.
      [WordNet 1.5]

   2. the sector of industry that designs and builds aircraft,
      rockets, missiles, and devices or vehicles intended to
      operate in outer space.
      [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

aerospace \aerospace\ a.
   of or pertaining to aerospace in either sense.
   [PJC]

WordNet (r) 3.0 (2006):

aerospace
    n 1: the atmosphere and outer space considered as a whole