antihuman adjective 2noun 2forms 3 adjective2 •Opposed to humanity.I would like this antihuman woman to know that she has played right into the hands of abusers everywhere by making this claim. — 1991 •Describing an antibody that reacts with any antigen found in (and with some relevant degree of specificity to) humans. noun2 •A being that opposes, or typifies the opposite of, the human race.These witches, the human antihumans, are the most prevalent and present evil in the world. — 2011 •A human being made of antimatter.Heavy antielements such as antigold and antiuranium belong to science fiction and not to science. So do antihumans. — 2021 formsantihumans · more antihuman · most antihuman