nounThe 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 long-term, intimate, sometimes discreetly sexual relationship between two women.
Origin: Perhaps after the devoted women pairs from Boston depicted in The Bostonians by Henry James.