genetically /d͡ʒəˈneɾɪkli/ adverb3 •In a manner relating to genes or genetics.Genetically modified crops.John Smith is genetically related to Jane Doe. •In terms of origin or development.Genetically, a Greek tragedy consists of a series of choral songs to which have been added, before and after, divers epic, non-lyric elements. — 1924 •By being members of the same linguistic family.German and Danish are genetically related. formsmore genetically · most genetically