'build-up' definitions:

Definition of 'build-up'

From: GCIDE

buildup \build"up\, build-up \build-up\n.
1. the act of building up an accumulation.
Syn: build-up. [WordNet 1.5]
2. the events, such as advertising or publicity, causing increased interest in some coming event. The buildup to Superbowl XXIV was the most intense of the series. [PJC]