AST may refer to:
Asthma is a common long term inflammatory disease of the airways of the lungs. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and bronchospasm.
Astronomy (from Greek: αστρονομία) is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution.
Astrology is the study of the movements and relative positions of celestial objects as a means for divining information about human affairs and terrestrial events.
An astronaut or cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft.
In Western astrology, astrological signs are the twelve 30° sectors of the ecliptic, starting at the vernal equinox (one of the intersections of the ecliptic with the celestial equator), also known as the First Point of Aries.
Aston Villa Football Club (/ˈæstən ˈvɪlə/; nicknamed Villa, The Villa, The Villans, The Lions) is a professional association football club based in Aston, Birmingham, that plays in the Championship, the second level of English football.
An asterisk (*; from Late Latin asteriscus, from Ancient Greek ἀστερίσκος, asteriskos, "little star") is a typographical symbol or glyph.
Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids.
Aston Martin Lagonda Limited is a British manufacturer of luxury sports cars and grand tourers. It was founded in 1913 by Lionel Martin and Robert Bamford.