Entry 1 sense Webster, 1913 Exestuate · Ex·es·tu·ate · IPA /ɛɡˈzɛs.t͡ʃuˌeɪ̯t/ 01 v. i. To be agitated; to boil up; to effervesce. 1. To be agitated; to boil up; to effervesce.[Obs.]