Aerobic is either life or processes that require, or are not destroyed by, the presence of oxygen. The opposite is anaerobic.

---> see also:
"Aerobic" is in the UNSPSC Code "49201500"
  Aerobic training equipment

"Aerobic" is in the NAICS Code "713940"
  Fitness and Recreational Sports Centers
  Aerobic dance or exercise centers

Other definition:
Aerobic are Microorganisms that require free oxygen to biodegrade organic matter.

See methanotrophic, anAerobic.