v.1. To arouse the emotions of someone or something; excite someone or something: The skillful politician worked up the crowd. What I read in the newspaper today really worked me up.
2. To increase one's skill, responsibility, efficiency, or status to some level through work: I'm increasing my exercise routine and am slowly working up to 30 sit-ups a day.
3. work up to To intensify gradually to some state: The film works up to a thrilling climax.
4. To develop or produce something by mental or physical effort: I worked up my appetite while mowing the lawn. The doctors worked up a patient profile before making their diagnosis.