mimeographPronunciation: /ˈmɪmɪəgrɑːf/Definition of mimeograph noun a duplicating machine which produces copies from a stencil, now superseded by the photocopier. a copy produced on a mimeograph. verb [with object] make a copy of (a document) with a mimeograph: (as adjective mimeographed)a mimeographed letterOrigin: late 19th century: formed irregularly from Greek mimeomai 'I imitate' + -graphmimeograph in other Oxford dictionaries Definition of mimeograph in the US English dictionary