EX, Ex or The Ex may refer to:
Existentialism () is a tradition of philosophical enquiry which takes as its starting point the experience of the human subject—not merely the thinking subject, but the acting, feeling, living human individual.
Exxon Mobil Corporation, doing business as ExxonMobil, is an American multinational oil and gas corporation headquartered in Irving, Texas.
Extraterrestrial life is hypothetical life which may occur outside of Earth and which did not originate on Earth.
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917, but was not recognized as such.
Exercise is any bodily activity that enhances or maintains physical fitness and overall health and wellness.
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure.
Exponentiation is a mathematical operation, written as bn, involving two numbers, the base b and the exponent or power n.
In biology, extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species.
The traits of extraversion (or extroversion) and introversion are a central dimension in some human personality theories.