|Origin:||installer, from Medieval Latin, from stallum 'stall'|
to put a piece of equipment somewhere and connect it so that it is ready to be used:
They've installed the new computer network at last.
Security cameras have been installed in the city centre.
to add new software to a computer so that it is ready to be used [≠ uninstall]:
We've installed new anti-virus software.
to put someone in an important job or position, especially with a ceremony:
Churchill was installed as Chancellor of the university.
to settle somewhere as if you are going to stay for a long time