Definitions of go up:

• verb:   be erected, built, or constructed
• verb:   increase in value or to a higher point
• verb:   travel up, "We ascended the mountain"

  Example: "Go up a ladder"

• verb:   burn completely; be consumed or destroyed by fire
• verb:   move towards
• verb:   go upward with gradual or continuous progress
• verb:   move upward