unisexual adjective 3noun 1forms 1 adjective3 •Of an organism, having characteristics of a single sex (as opposed to hermaphrodites).Most animals are unisexual. •Unisex; suitable for any sex or gender.You may not be familiar with the name or it could be a unisexual name, and some women and men may have first names that are more traditional for the opposite gender. — 2015 •Of a species, having only a single (potentially hermaphroditic) sex (as opposed to bisexual). noun1 •An organism which is unisexual. formsunisexuals