EP, ep, or Ep may refer to:
A seizure, formally known as an epileptic seizure, is a period of symptoms due to abnormally excessive or synchronous neuronal activity in the brain.
The Episcopal Church (TEC) is a member church of the worldwide Anglican Communion and is based in the United States with additional dioceses elsewhere.
Epistemology ( (listen); from Greek ἐπιστήμη, epistēmē, meaning 'knowledge', and -logy) is the branch of philosophy concerned with the theory of knowledge.
Epilepsy is a group of neurological disorders characterized by recurrent epileptic seizures. Epileptic seizures are episodes that can vary from brief and nearly undetectable periods to long periods of vigorous shaking.
Epiphany ( i-PIF-ə-nee) is a Christian feast day that celebrates the revelation (theophany) of God incarnate as Jesus Christ.
In biology, epigenetics is the study of heritable phenotype changes that do not involve alterations in the DNA sequence.
The Epic of Gilgamesh () is an epic poem from ancient Mesopotamia that is often regarded as the earliest surviving great work of literature and the second oldest religious text, after the Pyramid Texts.
Ephedrine is a medication and stimulant. It is often used to prevent low blood pressure during spinal anesthesia.
The Epstein–Barr virus (EBV, sometimes abbreviated as EPV), formally called Human gammaherpesvirus 4, is one of the nine known human herpesvirus types in the herpes family, and is one of the most common viruses in humans.