Learner's definition of INSTALLATION
the act or process of making a machine, a service, etc., ready to be used in a certain place
the act of installing something
a ceremony in which someone is put in an official or important job
something (such as a piece of equipment) that is put together and made ready for use
a place that is used for training soldiers, keeping military supplies and machinery, etc.
a work of art that usually has several parts (such as a sculpture, lights, and sound) and that is usually shown in a large space