The definition of a penis is a male genital organ.
An example of penis is a male genital organ used for sex and urination.
nounpl. -·nises or -·nes·
the male organ of sexual intercourse: in mammals it is also the organ through which urine is excreted
Origin of penisL, tail, penis from Indo-European base an unverified form pes- from source Sanskrit pásas-, Classical Greek peos, Old English fæsl, penis
nounpl. pe·nis·es, or pe·nes
- The male organ of copulation in higher vertebrates. In mammals, it also serves as the male organ of urinary excretion.
- Any of various copulatory organs in males of lower animals.
Origin of penisLatin pēnis ; see pes- in Indo-European roots.
(plural penises or penes)
The hyperforeign Latinate penii is occasionally used as the plural in modern English.