in·stall also in·stal (ĭn-stôl') tr.v.
in·stalled, in·stall·ing, in·stalls also in·stals
To connect or set in position and prepare for use: installed the new furnace; installed software on my computer.
To induct into an office, rank, or position: a ceremony to install the new governor.
To settle in an indicated place or condition; establish: installed myself in the spare room.
[Middle English installen, to place in office, from Old French installer, from Medieval Latin īnstallāre : Latin in-, in; see in-2 + stallum, stall, place; see stel- in Indo-European roots.] in·stall'er n.