su·per·at·om (so?o?p?r-?t??m)n. See Bose-Einstein condensate.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.superatom (?su?p?r?æt?m) n (Atomic Physics) physics a cluster of atoms behaving in certain ways like a single atomCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014