Duo/ˈduːəʊ/ Definition 1 of 2Pro Tip 1/3Performance Context Use 'duo' when referring to two people working together, especially in music or comedy. The stand-up duo kept the audience laughing all night. Pro Tip 2/3Strong Association 'Duo' implies a strong partnership or association, suggesting they are rarely seen apart. The detective duo solved every case assigned to them. Pro Tip 3/3Common Combos 'Duo' often appears with words like 'dynamic' to highlight exceptional teamwork or rapport. Batman and Robin are known as the dynamic duo.