aer·o·bic (â-r??b?k)adj.1. Biology a. Living or occurring only in the presence of free oxygen: aerobic bacteria.b. Of or relating to aerobes.2. Involving or improving oxygen consumption by the body: aerobic exercise.3. Relating to or used in aerobics: aerobic shoes.aer·o?bi·cal·ly adv.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.aerobic (???r??b?k) adj1. (Biology) (of an organism or process) depending on oxygen2. (Biology) of or relating to aerobes3. designed for or relating to aerobics: aerobic shoes; aerobic dances. Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014aer?o?bic (???ro? b?k) adj. 1. (of an organism or tissue) requiring the presence of air or free oxygen to sustain life. 2. pertaining to or caused by the presence of oxygen. 3. of or pertaining to aerobics: aerobic dancing. [1880?85] aer?o?bi?cal?ly, adv. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.aer·o·bic (â-r??b?k) Needing or using oxygen to live: aerobic organisms. ? Exercise that increases the activity of the heart and lungs improves the body’s ability to use oxygen and is called aerobic exercise. Compare anaerobic.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.