Anterior is defined as something that is put in front of something.(adjective)
An example of a room that is in the anterior of the house is the foyer.
The definition of anterior is something that happened before.(adjective)
An example of an historical event that is anterior to now is World War I.
See anterior in Webster's New World College Dictionary
Origin: L, compar. of ante, before
See anterior in American Heritage Dictionary 4
Origin: , comparative of ante, before; see ant- in Indo-European roots.
Learn more about anterior