Entry 2 senses · 2 variants Webster, 1913 Proem · Pro·em · IPA /ˈpɹəʊ.əm/ n. v. t. 01 n. Preface; introduction; preliminary observations; prelude. 1. Preface; introduction; preliminary observations; prelude. “Thus much may serve by way of proem.” — Swift. 02 v. t. To preface. 1. To preface.[Obs.]