Overhaul/ˈəʊvərhɔːl/ Definition 1 of 3Pro Tip 1/3Comprehensive Fix Implies a thorough fix, not just minor adjustments or repairs. The old theater underwent an overhaul to restore its former glory. Pro Tip 2/3Improve Functionality Focuses on optimizing performance or usability, often of machines or systems. They decided to overhaul the software to improve user experience. Pro Tip 3/3Update Appearance Can involve updating something to look more modern or appealing. The hotel's lobby was overhauled with contemporary decor.