Home › Words › M › moodsettermoodsettermoodsetter means A person, thing, or event that determines the emotional tone in a time and place.EtymologyFrom mood + setter.nounA person, thing, or event that determines the emotional tone in a time and place.e.g.“The third cocktail party essential, music, is a major moodsetter for your party.” — 2011, Cheryl Charming, The Everything Cocktail Parties and Drinks Book, link:Definitions & examples from Wiktionary (CC BY-SA 3.0).