GNU Collaborative International Dictionary of English

Found one definition

1.       
   Margarine , n. [F.; see margarin.]
   A processed food product used as an inexpensive substitute for butter, made primarily from refined vegetable oils, sometimes including animal fats, and churned with skim milk to form a semisolid emulsion; also called oleomargarine; artificial butter.
   Webster 1913 Suppl.
   +PJC
   The word margarine shall mean all substances, whether compounds or otherwise, prepared in imitation of butter, and whether mixed with butter or not.
   Margarine Act, 1887 (50 & 51 Vict. c. 29).
   
   Webster 1913 Suppl.
   Margarin.
   Webster 1913 Suppl.