1. The first three letters of the Greek name of Jesus.2. Sometimes interpreted as referring to the Latin phrase ‘Iesus Hominum SalvatorIHS 1. The first three letters of the Greek name of Jesus.2. Sometimes interpreted as referring to the Latin phrase 'Iesus Hominum Salvator' ('Jesus, Savior of men') or connected with 'In Hoc Signo' ('in this sign you shall conquer') said to have been adopted by the Roman Emperor Constantine as his motto following a vision in 312.’ (‘JesusJesus (Greek form of Hebrew 'Joshua' meaning 'Yahweh [God] is salvation') Also given the title Christ, meaning 'anointed one' or Messiah. His life is recorded mainly in the Four Gospels although he is also mentioned by the Jewish historian Josephus (c. 37-c.100) and the Roman historian Tacitus (c.110)., Savior of men’) or connected with ‘In Hoc SignoIHS 1. The first three letters of the Greek name of Jesus.2. Sometimes interpreted as referring to the Latin phrase 'Iesus Hominum Salvator' ('Jesus, Savior of men') or connected with 'In Hoc Signo' ('in this sign you shall conquer') said to have been adopted by the Roman Emperor Constantine as his motto following a vision in 312.’ (‘in this sign you shall conquer’) said to have been adopted by the Roman Emperor Constantine as his motto following a vision in 312.