ses?ame oil` n. a yellow oil expressed from the seeds of the sesame, used in cooking, as a vehicle for medicines, and in the manufacture of margarine, soap, and cosmetics. [1865?70] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.sesame oilAn aromatic oil, particularly the unrefined, thick brownish version, made from sesame seeds. Used more as a flavoring than as a cooking oil.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited