trendy /ˈtɹɛndi/adjective 1noun 1forms 3 adjective1 •(informal) Of, or in accordance with the latest trend, fashion or hype.I hate those trendy pre-wrinkled shirts. noun1 •(informal) A trendy person.They're the kids who care. Yet they're the bad kids, and the trendies, the ones who are too cool to let anything matter, are the good kids. It's all twisted around. — 1995 formstrendies · trendier · trendiest