to place (machinery, equipment, etc) in position and connect and adjust for use
2.
to transfer (computer software) from a distribution file to a permanent location on disk, and prepare it for its particular environment and application
3.
to put in a position, rank, etc
4.
to settle (a person, esp oneself) in a position or state: she installed herself in an armchair
[C16: from Medieval Latin installāre, from in-² + stallumstall1]
instalorinstal
—vb
[C16: from Medieval Latin installāre, from in-² + stallumstall1]
1548, "place in (ecclesiastical) office by seating in an official stall," from M.L. installare, from L. in- "in" + M.L. stallum "stall," from a Gmc. source (cf. O.H.G. stal "standing place;" see stall (1)). Installation "act of setting up" (machinery, etc.) is first recorded 1882.