Installer. A software utility that installs an application.
"The installer downloaded automatically and began setting up the new game on my computer without any further input from me."
In plain English: An install is the process of putting new software onto your computer so you can use it.
"The installation of the new software took much longer than expected."
Usage: Do not use "install" as a noun to refer to software; instead, use the specific term "installer." The word "install" functions only as a verb meaning to set up or put something in place.
To connect, set up or prepare something for use.
"The technician spent all afternoon installing the new software on my computer so I could access our shared files."
In plain English: To install something means to set it up and get it ready for use, like putting together a new video game console.
"We need to install new software on your computer before you can start working."
Usage: Use "install" to describe the process of setting up software on a device or fitting physical equipment like appliances into place. Avoid using it as a synonym for "establish" in abstract contexts, such as installing a rule or tradition.
The word "install" comes from the Medieval Latin phrase meaning to put something in a stall or designated place. It entered English via Middle French and originally referred to placing someone or something into their proper position before taking on its modern technical sense.