Entry 2 senses · 2 variants Webster, 1913 Pustulate · Pus·tu·late · IPA v. t. a. 01 v. t. To form into pustules, or blisters. 1. To form into pustules, or blisters. 02 a. Covered with pustulelike prominences; pustular; pustulous; as, a pustulate leaf; a pustulate shell or coral. 1. Covered with pustulelike prominences; pustular; pustulous; as, a pustulate leaf; a pustulate shell or coral.