Definitions: (1) happy; optimistic; cheerful; (2) marked by an increase in activity; prosperous

• Being upbeat is the key to life. — David Paradine Frost (1939-2013) British television host
• In any walk of life, a positive, upbeat outlook trumps any adversarial act. Revenge is counterproductive. Unproductive emotions limit one’s ability to move forward, to focus, to think positively, to act creatively. — Jon Meade Huntsman, Jr. (1960-) 16th Governor of Utah