business jargon The number units of a particular product or service that are currently in use, especially software or an Internet or computing platform. (Also referred to as "install(ed) user base" or simply "user base.") There have been fears that the computer giant's existing installed base may decline after their newest operating system is implemented.

business jargon The number units of a particular product or service that are currently in use, especially software or an Internet or computing platform. (Also referred to as "install(ed) base" or "user base.") There have been fears that the computer giant's existing installed user base may decline after their newest operating system is implemented.

To formally induct someone into a particular office or role. A noun or pronoun can be used between "install" and "as." Sharon will be installed as our mayor next Friday.

To insert some device or machine into someone or something. They're coming to install the new dishwasher in our kitchen tomorrow, thank goodness. Yeah, the orthodontist is going to install a permanent retainer in my mouth.