The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- A woman holding a British hereditary title of honor reserved for commoners, ranking immediately below the barons and above all orders of knighthood except the Garter.
- Abbr. Btss. Used as the title for such a woman.