although the dictionary also allows "geniuses" although the dictionary also allows "geniuses" Merriam-Webster definition of the term genius. genius Merriam-Webster definition of the term genius. Merriam-Webster http://www.merriam-webster.com/dictionary/genius genius Merriam-Webster checked Merriam-Webster although the dictionary also allows "geniuses" definition Origin of GENIUS Joss Whedon although the dictionary also allows "geniuses" Merriam-Webster dictionary of genius reliable dictionary