an increase in the amount of something over a period of time
Example:
- a steady build-up of traffic in the evenings
- carbon dioxide build-up in the atmosphere
- The leak led to a slow build-up of carbon dioxide.
the time before an important event, when people are preparing for it
Example:
- the build-up to the president’s visit
- the build-up to her wedding
a very positive and enthusiastic description of something that is going to happen, that is intended to make people excited about it
Example:
- The media have given the show a huge build-up.