va·gi·na / vəˈjīnə / • n. ( pl. -nas or -nae / -nē; -nī / ) the muscular tube leading from the external genitals to the cervix of the uterus in women and most female mammals. ∎  Bot. & Zool. any sheathlike ...

Genital canal in females. Together with the cavity of the uterus , it forms the birth canal. In most virgins, its external opening is partially closed by a thin fold of tissue (hymen), which has various forms, not all of which significantly obstruct the opening. The vagina's lining thickens and ...