Alter

Alter may refer to:


 * Alter (name), people named Alter
 * Alter (automobile)
 * Alter (crater), a lunar crater
 * Alter Channel, a Greek TV channel
 * Archbishop Alter High School, a Roman Catholic high school in Kettering, Ohio
 * ALTER, a command in older implementations of COBOL
 * Alter ego, or "alter" in popular usage, a "second self"
 * Alter (SQL)
 * Alter (album), 2002 album by Floater
 * Alter, a 2006 remix album by Swiss band Knut
 * "Alter", a song from the 1994 album Glow, by Raven