Entry 2 senses · 2 variants Webster, 1913 mimeo · IPA /ˈmɪm.i.oʊ/ n. v. t. 01 n. A mimeograph. 1. A mimeograph. Syn. mimeograph, mimeograph machine, Roneo. 02 v. t. to make copies of using a mimeograph. 1. to make copies of using a mimeograph. Syn. mimeograph.