the act of installing something (as equipment)
"the telephone installation took only a few minutes"
present participle of install
"The technician is installing the new software update on my laptop right now."
In plain English: Installing means putting something together or setting it up so it is ready to use.
"They are currently installing new software on my computer."
Usage: Use "installing" when describing the process of setting up software on a computer or placing someone into a position of authority. Do not use it to mean physically attaching a device like a toilet unless the focus is specifically on the setup procedure rather than the physical attachment itself.
Derived from Old French enstaller, this term combines Latin in (into) and stare (to stand), originally meaning to set up or place firmly in position. It evolved from the literal sense of placing furniture into a house to its modern usage regarding software setup.