Gemini is an air sign. In astrology, the 12 zodiac signs are grouped into four elements: fire, earth, air, and water. Each element has three signs associated with it. The air signs are Gemini, Libra, and Aquarius. People born under air signs are communicative, sharp, and intellectual, but they can also be prone to overindulging in fantasy and theory. Gemini is associated with communication, logical thought processes, and the conscious mind. Geminis tend to be airy and intellectual, curious about life and other people, and they can experience two sides of things at the same time.