microfilm Syllabification: (mi·cro·film)Pronunciation: /ˈmīkrəˌfilm/Translate microfilm | into French | into German | into Italian | into Spanish Definition of microfilm noun a length of film containing microphotographs of a newspaper, catalog, or other document:all those forms go on microfilm his vast hoard of microfilms verb [with object] make a microfilm of (a newspaper, catalog, or other document). microfilm in other Oxford dictionaries Definition of microfilm in the British & World English dictionary