12 letters · 12 points in Scrabble
noun the act of installing something (as equipment)
noun a building or place that provides a particular service or is used for a particular industry
noun a formal entry into an organization or position or office
originFrom Middle French installation, from Medieval Latin installātiō. By surface analysis, install + -ation. Compare with Piedmontese istallassion.
Etymology from Wiktionary, CC BY-SA 3.0