Turret/ˈtɜːrət/ Definition 1 of 3Pro Tip 1/3Historical Structures Turret often refers to old, historical buildings like castles, not modern ones. Medieval castles had turrets for defense and lookout. Pro Tip 2/3Architecture Element In architecture, turrets have a decorative purpose and evoke a fairy-tale image. The mansion's turrets added to its Victorian charm. Pro Tip 3/3Physical Position Turrets are usually high up on buildings giving them a strategic panorama. The princess gazed out from the castle turret.