An abnormal aversion of the opposite sex: Sometimes heterophobia is considered by some psychoanalysts to be a partial explanation for homosexual behavior.

An irrational dread of doing something differently or of not being able to do things in the usual way or manner: Greg suffered from heterophobia in that he always did the same things every morning and was afraid to do anything in an unfamiliar way. This term has nothing to do with a hatred or fear of heterosexuals or their cultures!