installin·stall /ɪnˈstɔːl-ˈstɒːl/ verb (past tensepst and past participlepp installed, present participle installing) [transitiveT]1to put equipment into a place and connect it so that it is ready to useThey help install and operate big computer systems.
2COMPUTING to copy a program onto a computer so that it is ready to useTo protect yourself against hacking, install a firewall program.
3to give someone an important job or positionUnited Technologies installed senior environmental officers in each division.