Com`pli·men'tal adjective Complimentary. [ Obsolete] « Languages . . . grow rich and abundant in complimental phrases, and such froth. Sir H. Wotton. » -- Com`pli*men'tal*ly , adverb [ Obsolete] Boyle. -- Com`pli*men'tal*ness Found on http://www.encyclo.co.uk/webster/C/122