To formally or ceremoniously install in an office, position, etc.
To draft into military service.
To introduce into (particularly if certain knowledge or experience is required, such as ritual adulthood or cults).
To bring in as a member; to make a part of.
To admit formally into an office, rank or position.
To connect, set up or prepare something for use, often specifically (in Computing) to transfer software onto a device's permanent storage and put it in a state where it is ready to be run when needed, usually decompressing it if necessary and performing any necessary pre-first-run configuration.
To establish or settle in.
An installation. (Usage originated as a truncated form of the word installation.)
Installer. A software utility that installs an application.