prehuman adjective 1noun 1forms 1 adjective1 •Preceding the advent of modern humanity, Homo sapiens. noun1 •One of the human-like creatures that existed before Homo sapiens.They said the find also added to evidence that painted a picture of Homo erectus as the prehumans who took long evolutionary strides — figuratively and, now it seems, also literally. — 2009 formsprehumans