Entry 2 senses · 2 variants Webster, 1913 acetylate · IPA v. i. v. t. 01 v. i. receive substitution of an acetyl group; of chemical compounds 1. receive substitution of an acetyl group; of chemical compounds(Chem.) Syn. acetylize 02 v. t. introduce an acetyl group into a chemical compound 1. introduce an acetyl group into a chemical compound(Chem.) Syn. acetylize