The Amorites were one of the seven nations defeated by Joshua in his conquest of Canaan. The Amorites lived in southern Syria and were a militant nation, who invaded Mesopotamia at the end of the third millennium and captured Babylon soon thereafter. As they developed kingdoms on their newly conquered land, the Amorites' culture assimilated with that of mainstream Babylonia. The Bible also mentions the Amorites, saying that Moses captured two Amorite kingdoms (Heshbon and Bashan).
Sources: Bridger, David. Ed. The New Jewish Encyclopedia. NY: Behrman House, Inc. 1976.
Schreiber, Mordecai (ed.). The Shengold Jewish Encyclopedia. Shengold Books. 1998.
Telushkin, Joseph. Jewish Literacy. William Morrow and Company, Inc. 1991.