Possible Definitions:
1. Film (n.) A thin skin; a pellicle; a membranous covering, causing opacity; hence, any thin, slight covering.
2. Film (n.) A slender thread, as that of a cobweb.
3. Film (v. t.) To cover with a thin skin or pellicle.
4. Film (n.) The layer, usually of gelatin or collodion, containing the sensitive salts of photographic plates; also, the flexible sheet of celluloid or the like on which this layer is sometimes mounted.