GNU Collaborative International Dictionary of English

Found one definition

1.       
   Enlarger (?), n.
   1. One who or that which enlarges.
   
   [1913 Webster]
   
   
   2. (Photography) an optical device for making copies of photographs larger than the original, having a head for holding the original, a source of illumination to project the image, and a bed for holding the sensitized photographic paper which will received the larger image.
   
   [PJC]