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

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "aerospace":
   CAT, aerial, aerophysical, aerosphere, aerotechnical, air hole,
   air pocket, air-conscious, air-minded, air-wise, airsick, airspace,
   airworthy, aviational, bump, ceiling, crosswind, empty space,
   favorable wind, fog, front, head wind, high-pressure area, hole,
   ionosphere, jetstream, low-pressure area, overcast, pocket,
   roughness, soup, space, stratosphere, substratosphere, tail wind,
   tropopause, troposphere, trough, turbulence, visibility,
   visibility zero