| Noun | 1. | buildup - the act of building up an accumulation; "I envied his rapid buildup of assets"; "a military buildup in preparation for the invasion" | |
| 2. | buildup - the result of the process of accumulation; "the buildup of leaves blocked the drain pipes" | |
| 3. | buildup - highly favorable publicity and praise; "his letter of recommendation gave her a terrific buildup" | |