The rising sign is the Zodiac sign of the Ascendant. It's the sign on the first house cusp. It influences how others see you, your behavior, style and personality. The vibrational cloak of the rising sign is your garb for engaging with the world.
The Zodiac sign of your Ascendant, is determined by where the Sun was rising on the eastern horizon at the moment of your birth. It's found on the center left of the wheel, and abbreviated with ASC.