noun

• The group of languages used by any of several Athabascan-speaking peoples of the American southwest excluding Navajo, i.e. Chiricahua, Jicarilla, Lipan, Mescalero, Plains Apache, or Western Apache.
• Apache, a town in Oklahoma, United States.
• (computing, informal) Apache HTTP Server, a widely used open source web server software suite.
• Any of several Athabascan-speaking peoples of the American southwest excluding Navajo, i.e., Chiricahua, Jicarilla, Lipan, Mescalero, Plains Apache, or Western Apache.
• A person belonging to an Apache people.
• (historical) A Parisian gangster of the late 19th and early 20th centuries.
• (military) AH-64 Apache, a U.S. military helicopter.
• Alternative letter-case form of Apache, a Parisian gangster. [The group of languages used by any of several Athabascan-speaking peoples of the American southwest excluding Navajo, i.e. Chiricahua, Jicarilla, Lipan, Mescalero, Plains Apache, or Western Apache.]