posthuman adjective 1noun 1forms 3 adjective1 •Succeeding human beings as presently defined; more than, or beyond, what is human.Despite his title, Dr. [Francis] Fukuyama has no taste for a rerun of history and believes a posthuman future is one to avoid. — 2002 noun1 •A supposed being of this kind.Well, Dr. Vinge said, it’s possible that artificial post-humans would use us the way we’ve used oxen and donkeys. — 2008 formsposthumans · more posthuman · most posthuman