From Longman Business Dictionaryinstallerin‧stal‧ler /ɪnˈstɔːlə-ˈstɒːlər/ noun [countable]1someone whose job is to put equipment into a place and connect it so that it is ready to useYour satellite TV system will be installed quickly and professionally by our skilled installers.2COMPUTING a program that helps you put some software on a computerDifferent installers are required for each platform.