Justin \j(u)-stin, jus-tin\ as a boy's name is pronounced JUS-tin. It is of Latin origin, and the meaning of Justin is "just, upright, righteous". Variant of Justus. Saint Justin (second century) was a Greek philosopher who wrote of the moral values of Christianity. See also Jestin. Actor Justin Henry; singer Justin Timberlake.
For more information, see also the related name Dustin.