instal /ɪnˈstɔːl/ verb4 •To connect, set up or prepare something for useEach TBM installs two-metre-wide rings made up of seven precast concrete segments produced on-site. Each ring takes approximately 45 minutes to one hour to install. — 2021 •To transfer software onto a device's permanent storage and put it in a state where it is ready to be run when needed, usually decompressing it if necessary and performing any necessary pre-first-run configuration.I haven't installed the new operating system yet because of all the bugs. •To admit formally into an office, rank or position.He was installed as Chancellor of the University. •[with oneself] To establish or settle in.I installed myself in my usual chair by the fire. formsinstalled · installing · instals