From Longman Dictionary of Contemporary Englishinstallationin‧stal‧la‧tion /ˌɪnstəˈleɪʃən/ ●●○ noun 1 [uncountable]TPUT when someone fits a piece of equipment somewhere the installation and maintenance of alarm systems2 [countable]T a piece of equipment that has been fitted in its place The whole computer installation was nearly new.3 [countable]TIPM a place where industrial or military equipment, machinery etc has been put nuclear installations4 [countable] a piece of modern art which can include objects, light, sound etc5 [uncountable] formalSSOBO the ceremony of putting someone in an important job or position the installation of the new bishop
Examples from the Corpus
installation• The bombing raids targeted military installations.• the installation of a security system• Surround-sound capabilities can be added to older video installations.From Longman Business Dictionaryinstallationin‧stal‧la‧tion /ˌɪnstəˈleɪʃən/ noun1[countable] a building containing industrial or military equipment and machineslarge industrial installationsThey targeted their attacks on government installations.2[uncountable] when a new piece of equipment is installed somewhereThey had allowed $2.7 million for installation of a new computer system.3[uncountable] when a new program is put into a computerthe installation of new anti-virus software 