Oxford Dictionary English sunset industry nounnoun BrE BrE//ˈsʌnset ɪndəstri// ; NAmE NAmE//ˈsʌnset ɪndəstri// Add to my wordlistjump to other resultsan old industry that has started to become less successful the older sunset industries such as steel compare sunrise industryCheck pronunciation: sunset industry oxfordlearnersdictionaries.com