verb

• (transitive) To connect, set up or prepare something for use
  "Across Japan, technology companies and private investors are racing to install devices that until recently they had little interest in: solar panels. Massive solar parks are popping up as part of a rapid build-up that one developer likened to an "explosion.""
• (transitive) To connect, set up or prepare something for use
  "I haven't installed the new operating system yet because of all the bugs."
• (transitive) To admit formally into an office, rank or position.
  "He was installed as Chancellor of the University."
• (transitive, sometimes reflexive) To establish or settle in.
  "I installed myself in my usual chair by the fire."

noun

• (computing, informal) An installation: the process of installing a software application.
  "The install takes a long time, but you can run it in the background while working on other things."
• (computing, informal) An installation: a software application that has been installed.
  "I've customized my local install; the out-of-the-box version looks a bit different."