Entry 2 senses · 2 variants Webster, 1913 Acervate · A·cer·vate · IPA /ˈæs.ɚ.veɪt/ v. t. a. 01 v. t. To heap up. 1. To heap up.[Obs.] 02 a. Heaped, or growing in heaps, or closely compacted clusters. 1. Heaped, or growing in heaps, or closely compacted clusters.