NOUN (1)

1. film on which materials are photographed at greatly reduced size; useful for storage; a magnification system is used to read the material;


VERB (1)

1. record on microfilm;

The Collaborative International Dictionary of English v.0.48:

Microfilm \Mic"ro*film\, n. [Micro- + film.]
   a photographic film with one or more very small images of
   printed or other graphic matter. Numerous images,
   corresponding to the contents of a book, newspaper, or
   journal, are typically produced on one long roll of film, and
   may be viewed for reading in a special apparatus called a
   microfilm reader.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Microfilm \Mic"ro*film\, v. t.
   to photograph and produce images of on microfilm.
   [PJC]

WordNet (r) 3.0 (2006):

microfilm
    n 1: film on which materials are photographed at greatly reduced
         size; useful for storage; a magnification system is used to
         read the material
    v 1: record on microfilm