penis /ˈpiː.nɪs/ noun2 •the male sex part outside the body, through which men and most male animals also pass waterThe female clitoris is homologous to the male penis.See, the problem is that God gives men a brain and a penis, and only enough blood to run one at a time. •A similar erectile sexual organ present in the cloacas of male amniotes. formspenes · penii · penises