v.1. To ascend something: It became colder as we went up the mountain. Let's go up to the roof deck and watch the fireworks.
2. To travel north: Next summer, let's go up to Alaska where it won't be so hot. We went up and stayed with a friend in Canada.
3. To go to a less central location in a town or city: We went up to the new movie theater to see an art film.
4. To go to some larger town or city: On the weekends we often go up to New York. We went up and saw a show in the city.
5. go up to To extend or to reach some point or time: My new calendar only goes up to December.
6. To approach someone or something: I went up to the counter and asked for a soda. Your friends have arrived—why don't you go up and say hello?
7. To increase in value or intensity: If the temperature goes up, the snow will melt.
8. To begin to burn: A spark from the train lit the nearby brush, and the entire field went up.
9. To be constructed or in the process of construction: New buildings are going up all over the city.
10. To occur or arise. Used of noises made by crowds: We heard a cheer go up whenever the team scored a goal.
11. go up against To be confronted with an opponent or challenge: In the third round, I went up against the best player in the league.