1. 
   Hypersonic
   [disambiguation] Hypersonic speeds are highly supersonic. Hypersonic may also refer to: ==Speed== ==Sound== ==Other uses== ...
   Found op http://en.wikipedia.org/wiki/Hypersonic_(disambiguation)
   
   
2. 
   Hypersonic
   A range of speed that is five times or more the speed of sound in air. See also: Hypervelocity, Subsonic, Supersonic.
   Found op http://www.diracdelta.co.uk/science/source/h/y/hypersonic/source.html
   
   
3. 
   hypersonic
   Pertaining to or characterised by supersonic speeds of Mach 5 or greater. While any speed above the speed of sound may be referred to as supersonic, speeds of Mach 5 or greater are specifically referred to as hypersonic. ... Origin: hyper-+ L. Sonus, sound ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?hypersonic
   
   
4. 
   hypersonic
   hypersonic (high' pur SAHN ik) 1. Much faster than the speed of sound. 2. Relating to speeds five or more times than that of the normal speed of sound in the air; such as, rockets, certain air currents, aircraft, etc.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1986/
   
   
5. 
   hypersonic
   Descriptive of something that travels at speeds greater than Mach 5 (five times the ambient speed of sound). At such speeds, the temperature in the boundary layer and on the surface of the moving vehicle exceeds 1,800 °F (1,000 °C) and aerodynamic heating becomes important in aircraft design...
   Found op http://www.daviddarling.info/encyclopedia/H/hypersonic.html
   
   
6. 
   hypersonic
   Type: Term Pronunciation: hī′pĕr-son′ik Definitions: 1. Pertaining to or characterized by supersonic speeds of Mach 5 or greater. Although any speed above the speed of sound may be referred to as supersonic, speeds of Mach 5 or greater are specifically referred to as hypersonic...
   Found op http://www.medilexicon.com/medicaldictionary.php?t=42606
   
   
7. 
   HYPERSONIC
   Speed of flight at or greater than Mach 5.0, exceeding SUPERSONIC.
   Found op http://www.aerofiles.com/glossary.html
   
   

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