Upbeat/ˈʌpbiːt/ Definition 1 of 3Pro Tip 1/3Emotional Boost Use 'upbeat' to express a lift in spirits or mood. Listening to her favorite song, she felt instantly upbeat. Pro Tip 2/3Optimistic Outlook 'Upbeat' often describes a hopeful view of the future. Even after a minor setback, his upbeat outlook was contagious. Pro Tip 3/3Contrast in Tone Use 'upbeat' to contrast with a previous negative situation. After the bad weather passed, everyone was in an upbeat mood.