Meaning

• Installer. A software utility that installs an application.

  "After inserting the disk, you need to run the install."

• An installation. (Usage originated as a truncated form of the word installation.)

Meaning

• To connect, set up or prepare something for use.

  "I haven't installed the new operating system yet because of all the bugs."

• To admit formally into an office, rank or position.

  "He was installed as Chancellor of the University."

• To establish or settle in.

  "I installed myself in my usual chair by the fire."