n 1  :  divergence in one or more characteristics of an organism or biotype from those typical of or usual for its group  2  :  something (as an individual or group) that exhibits variation var*i*a*tion*al adj 
 
   
 
Similar sounding terms:  fresh·en  ver·sion 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2008.