Entry 2 senses · 2 variants Webster, 1913 Instimulate · In·stim·u·late · IPA v. t. v. t. 01 v. t. Not to stimulate; to soothe; to quiet. 1. Not to stimulate; to soothe; to quiet.[Obs.] 02 v. t. To stimulate; to excite. 1. To stimulate; to excite.[Obs.]