in·stall also in·stal (ĭn-stôl)
tr.v. in·stalled, in·stall·ing, in·stalls also in·stals
1. To connect or set in position and prepare for use: installed the new furnace; installed software on my computer.
2. To induct into an office, rank, or position: a ceremony to install the new governor.
3. 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 the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.