To alter generally means to change something but may also refer to:
Alter , people named Alter
Alter
Alter , a lunar crater
Alter Channel, a Greek TV channel
Archbishop Alter High School, a Roman-Catholic high school in Kettering, Ohio
Dinsmore Alter (1888?1968), American astronomer and meteorologist
"Alter", a song by Raven from their 1994 album Glow
See also
Altar