Definitions of come up:

• verb:   be mentioned
• verb:   bring forth, usually something desirable
• verb:   originate or come into being
• verb:   occur
• verb:   start running, functioning, or operating
• verb:   move toward, travel toward something or somebody or approach something or somebody
• verb:   come up, of celestial bodies
• verb:   come to the surface
• verb:   get something or somebody for a specific purpose
• verb:   gather (money or other resources) together over time
• verb:   gather or bring together
• verb:   move upward